Remove Vue set for vue 3 migration

What does this MR do and why?

Describe in detail what your merge request does and why.

This MR partially resolves #452467 (closed)

What was cleaned up from epic:

1. Remove Vue.set

Vue set is no longer supported in VUE 3

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

NO VISUAL CHANGES

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Checkout branch
2. Run test locally
3. Or just check in pipeline
4. Run it also with VUE_VERSION=3 yarn jest --watch 

MR acceptance checklist

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

• I have evaluated the MR acceptance checklist for this MR.

added Category:SAST Category:Security Policy Management automation:ml devopssecure frontend groupsecurity policies sectionsec test vue3-migration labels

assigned to @arfedoro

	1 Warning
	This merge request does not refer to an existing milestone.

	1 Message
	CHANGELOG missing: If this merge request needs a changelog entry, add the Changelog trailer to the commit message you want to add to the changelog. If this merge request doesn't need a CHANGELOG entry, feel free to ignore this message.

Reviewer roulette

Category	Reviewer	Maintainer
frontend	@apennells (UTC-4, 6 hours behind author)	@ohoral (UTC+2, same timezone as author)

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Generated by Danger

@aalakkad could you please review this MR?

requested review from @aalakkad

added pipelinetier-1 label

approved this merge request

requested review from @ohoral and removed review request for @aalakkad

added pipeline:mr-approved label

@aalakkad, thanks for approving this merge request.

This is the first time the merge request has been approved. To ensure we don't only run predictive pipelines, and we don't break master, a new pipeline will be started shortly.

Please wait for the pipeline to start before resolving this discussion and set auto-merge for the new pipeline. See merging a merge request for more details.

added pipelinetier-2 label and removed pipelinetier-1 label

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

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

approved this merge request

added pipelinetier-3 label and removed pipelinetier-2 label

added typemaintenance label

resolved all threads

enabled an automatic merge when the pipeline for 1a2c5435 succeeds

aborted the automatic merge because source branch was updated

added 613 commits

• aed21189...2008657d - 612 commits from branch master
• 9e680cc6 - Remove Vue set for vue 3 migration

Compare with previous version

Generated by gitlab_quality-test_tooling.

---

Slow tests detected in this merge request. These slow tests might be related to this merge request's changes.

Click to expand

Job	File	Name	Duration	Expected duration
#6906359944	spec/features/projects/badges/list_spec.rb#L44	list of badges user changes current ref of build status badge	65.49 s	< 50.13 s

added rspec:slow test detected label

added 363 commits

• 9e680cc6...8831128b - 362 commits from branch master
• bab67952 - Remove Vue set for vue 3 migration

Compare with previous version

resolved all threads

enabled an automatic merge when the pipeline for a84bcc75 succeeds

merged

mentioned in commit 63dfea60

added workflowstaging-canary label

changed milestone to %17.1

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added releasedcandidate label

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