Fix Style/IfUnlessModifier offences

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What does this MR do and why?

Fixing offences for -

    - 'app/models/appearance.rb'
    - 'app/models/application_setting_implementation.rb'
    - 'app/models/bulk_imports/entity.rb'
    - 'app/models/ci/application_record.rb'
    - 'app/models/ci/build.rb'
    - 'app/models/ci/build_trace_chunk.rb'
    - 'app/models/ci/job_artifact.rb'
    - 'app/models/ci/pending_build.rb'
    - 'app/models/ci/pipeline.rb'
    - 'app/models/ci/runner.rb'

Related to #239356

added Engineering Productivity typemaintenance labels

added pipelinetier-1 label

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added Community contribution workflowin dev labels

assigned to @divyamtayal

changed the description

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added linked-issue label

	4 Warnings
	5c2b337f: The commit subject must contain at least 3 words. For more information, take a look at our Commit message guidelines.
	This merge request does not refer to an existing milestone.
	You've made some app changes, but didn't add any tests. That's OK as long as you're refactoring existing code, but please consider adding any of the maintenancepipelines, maintenancerefactor, maintenanceworkflow, maintenanceperformance, documentation, QA labels.
	Labels missing: please ask a reviewer or maintainer to add backend to this merge request.

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@gitlab-bot ready @splattael

added workflowready for review label and removed workflowin dev label

requested review from @splattael

@splattael, this Community contribution is ready for review.

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added 951 commits

• 8b649a55...4fed3d07 - 950 commits from branch gitlab-org:master
• 969eaa93 - Merge branch 'master' into '239356-fix-Style/IfUnlessModifier_4'

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resolved all threads

added 1 commit

• 5c2b337f - Resolving conflicts

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@splattael Pls review this.

changed milestone to %17.6