Fix Zoekt global code search- Backport

What does this MR do and why?

Backport for Fix Zoekt global code search (!165835 - merged)

Fix Zoekt global code search

There is no Code tab in search navigation now. There are no results with manual scope=blobs now.

This fix:

• uses :zoekt_cross_namespace_search for navigation,
• correctly overrides allowed scopes,
• adds and updates tests.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• This MR is backporting a bug fix, documentation update, or spec fix, previously merged in the default branch.
• The MR that fixed the bug on the default branch has been deployed to GitLab.com (not applicable for documentation or spec changes).
• This MR has a severity label assigned (if applicable).
• Set the milestone of the merge request to match the target backport branch version.
• This MR has been approved by a maintainer (only one approval is required).
• Ensure the e2e:test-on-omnibus-ee job has either succeeded or been approved by a Software Engineer in Test.

Note to the merge request author and maintainer

If you have questions about the patch release process, please:

• Refer to the patch release runbook for engineers and maintainers for guidance.
• Ask questions on the #releases Slack channel (internal only).

assigned to @rkumar555

changed target branch from master to 17-4-stable-ee

added pipelinetier-1 label

Proper labels assigned to this merge request. Please ignore me.

@rkumar555 - please see the following guidance and update this merge request.

	1 Error
	Please add typebug typefeature, or typemaintenance label to this merge request.

added backend typebug labels

	1 Warning
	The e2e:test-on-omnibus-ee job needs to succeed or have approval from a Software Engineer in Test. Read the "QA e2e:test-on-omnibus-ee" section for more details.

Reviewer roulette

Category	Reviewer	Maintainer
backend	@tyleramos (UTC-4, 6 hours behind author)	@DylanGriffith (UTC+11, 9 hours ahead of author)

Please refer to documentation page for guidance on how you can benefit from the Reviewer Roulette, or use the GitLab Review Workload Dashboard to find other available reviewers.

QA e2e:test-on-omnibus-ee

@rkumar555, the e2e:test-on-omnibus job must complete before merging this merge request.*

If there are failures on the e2e:test-on-omnibus pipeline, ping your team's associated Software Engineer in Test (SET) to confirm the failures are unrelated to the merge request. If there's no SET assigned, ask for assistance on the #test-platform Slack channel.

If needed, you can retry the danger-review job that generated this comment.

Generated by Danger

resolved all threads

E2E Test Result Summary

allure-report-publisher generated test report!

e2e-test-on-omnibus: test report for 3f7555be

expand test summary

+---------------------------------------------------------------------+
|                           suites summary                            |
+----------------+--------+--------+---------+-------+-------+--------+
|                | passed | failed | skipped | flaky | total | result |
+----------------+--------+--------+---------+-------+-------+--------+
| Govern         | 108    | 0      | 5       | 0     | 113   | ✅     |
| Create         | 547    | 0      | 72      | 0     | 619   | ✅     |
| Plan           | 82     | 0      | 9       | 0     | 91    | ✅     |
| Manage         | 25     | 2      | 18      | 6     | 45    | ❌     |
| GitLab Metrics | 2      | 0      | 1       | 0     | 3     | ✅     |
| Systems        | 7      | 0      | 0       | 1     | 7     | ✅     |
| Configure      | 1      | 0      | 3       | 0     | 4     | ✅     |
| Fulfillment    | 4      | 0      | 7       | 0     | 11    | ✅     |
| Monitor        | 12     | 0      | 13      | 0     | 25    | ✅     |
| Analytics      | 3      | 0      | 0       | 0     | 3     | ✅     |
| Package        | 31     | 0      | 14      | 0     | 45    | ✅     |
| Verify         | 51     | 0      | 15      | 0     | 66    | ✅     |
| Data Stores    | 46     | 0      | 11      | 0     | 57    | ✅     |
| Secure         | 4      | 0      | 2       | 0     | 6     | ✅     |
| Release        | 5      | 0      | 1       | 0     | 6     | ✅     |
| Ai-powered     | 0      | 0      | 2       | 0     | 2     | ➖     |
| Growth         | 0      | 0      | 2       | 0     | 2     | ➖     |
| ModelOps       | 0      | 0      | 1       | 0     | 1     | ➖     |
+----------------+--------+--------+---------+-------+-------+--------+
| Total          | 928    | 2      | 176     | 7     | 1106  | ❌     |
+----------------+--------+--------+---------+-------+-------+--------+

e2e-test-on-gdk: test report for 3f7555be

expand test summary

+------------------------------------------------------------------+
|                          suites summary                          |
+-------------+--------+--------+---------+-------+-------+--------+
|             | passed | failed | skipped | flaky | total | result |
+-------------+--------+--------+---------+-------+-------+--------+
| Create      | 128    | 0      | 16      | 0     | 144   | ✅     |
| Data Stores | 33     | 0      | 1       | 0     | 34    | ✅     |
| Govern      | 72     | 0      | 0       | 0     | 72    | ✅     |
| Verify      | 46     | 0      | 2       | 0     | 48    | ✅     |
| Plan        | 74     | 0      | 1       | 0     | 75    | ✅     |
| Fulfillment | 2      | 0      | 0       | 0     | 2     | ✅     |
| Package     | 20     | 0      | 12      | 0     | 32    | ✅     |
| Secure      | 4      | 0      | 0       | 0     | 4     | ✅     |
| Release     | 5      | 0      | 0       | 0     | 5     | ✅     |
| Monitor     | 8      | 0      | 0       | 0     | 8     | ✅     |
| Analytics   | 2      | 0      | 0       | 0     | 2     | ✅     |
| Manage      | 1      | 0      | 1       | 0     | 2     | ✅     |
+-------------+--------+--------+---------+-------+-------+--------+
| Total       | 395    | 0      | 33      | 0     | 428   | ✅     |
+-------------+--------+--------+---------+-------+-------+--------+

added groupglobal search label

added pipeline:skip-rspec-fail-fast label and removed groupglobal search label

added groupglobal search label

added devopsdata stores sectioncore platform labels

changed the description

changed milestone to %17.4

marked the checklist item This MR is backporting a bug fix, documentation update, or spec fix, previously merged in the default branch. as completed

marked the checklist item The MR that fixed the bug on the default branch has been deployed to GitLab.com (not applicable for documentation or spec changes). as completed

marked the checklist item Set the milestone of the merge request to match the target backport branch version. as completed

@terrichu Could you please do the review for this backport MR?

requested review from @terrichu

marked the checklist item This MR has a [severity label] assigned (if applicable). as completed