Backport fix for latest DS template in combination with Static Reachability

What does this MR do and why?

This MR fixes a an edge case bug introduced by !187135 (merged). You can read more about our solution and the root cause of the bug in !187929 (merged).

• MR introducing the bug
• Customer issue reporting the bug
• MR fixing the bug

The main issue was that the job dependency-scanning-with-reachability had a needs section on a job named build. When that job was declared in a stage after dependency-scanning-with-reachability, the pipeline was failing. In order to fix these cases we removed the build job from the needs section.

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).