fix(config): Remove usePlatformAutomerge restriction with gitLabIgnoreApprovals

[aav7fl]

Changes

Remove usePlatformAutomerge restriction with gitLabIgnoreApprovals.

Context

Discussed in #29968.

I took a non-invasive approach minimize any impact elsewhere by users.

• We use gitLabIgnoreApprovals to bypass approver restrictions on GitLab to auto-merge MRs that pass our pipeline.
• We want to auto-merge our MRs and use automergeSchedule to enforce this during business hours.
• We can't automergeSchedule if platformAutomerge=true, so we make platformAutomerge=false
• Now we can't use gitLabIgnoreApprovals anymore since it's gated behind platformAutomerge=true

We remove this check since it doesn't look like it's necessary.

Original PR with this addition even includes a comment wondering if it can be used with normal auto-merge.

https://github.com/renovatebot/renovate/pull/10981/files#r679454321

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

[rarkins]

Needs test addition for new case

[aav7fl]

Needs test addition for new case

@rarkins Sorry about that. New test added.

[aav7fl]

Had to push again to fix prettier. Hooks weren't working locally in my dev container.

[renovate-release]

🎉 This issue has been resolved in version 37.421.7 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 37.421.7

Your semantic-release bot 📦🚀