feat(manager/argocd): added support for argocd multisource

[piximos]

Changes

Added support for ArgoCD MultiSource

Context

• closes Add ArgoCD multisource support #20647

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[CLAassistant]

All committers have signed the CLA.

[secustor]

Please do not force push on ready PRs, if not necessary. https://github.com/renovatebot/renovate/blob/main/.github/contributing.md#do-not-force-push-to-your-pull-request-branch

[piximos]

Sorry for the force push

[secustor]

Needs code coverage.

[secustor]

Still needs coverage. This is line is missing:
https://github.com/renovatebot/renovate/pull/20648/files#diff-de5a018e5a8529dc329235872d68a919609bbdbb0e15bf7d19821fea28df153aR31
else the test will keep failing

[piximos]

Removed return[] in createDependency (referenced here) as it will never be executed due to the typing of the ApplicationDefinition's kind attribute.
All the variations of this field have been checked in prior steps and the removed line will never be executed

[secustor]

This will fail to compile now as there is no return value in all execution branches.

Simply add another test with an inline fixture of a Project CRD and you should be good to go.

[viceice]

yes, don't export helper functions. just use appropriate inline fixtures

[secustor]

You do not have to merge main as this will handled by the merge queue.

[renovate-release]

🎉 This PR is included in version 35.13.0 🎉

The release is available on:

• GitHub release
• 35.13.0

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