Enable AvoidCreate cop for spec/lib/sidebars

What does this MR do and why?

Related #414635 (closed)

Follow up on !122198 (comment 1414273472)

Enable AvoidCreate cop for spec/lib/sidebars and ee/spec/lib/sidebars

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changed milestone to %16.1

added Engineering Productivity maintenancerefactor static code analysis labels

assigned to @alinamihaila

added typemaintenance label

added backend label

	1 Warning
⚠	5c970f2e: Commits that change 30 or more lines across at least 3 files should describe these changes in the commit body. For more information, take a look at our Commit message guidelines.

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Category	Reviewer	Maintainer
backend	Patrick Cyiza (@jpcyiza) (UTC+2, 1 hour behind @alinamihaila)	Mark Chao (@lulalala) (UTC+8, 5 hours ahead of @alinamihaila)

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mentioned in merge request !122771 (merged)

@ddieulivol could you please review this when you have the chance?

There is a follow up for fixing quick offences in ee/spec/lib/sidebars in !122771 (merged)

If all good, we can assign maybe for maintainer review to @splattael

Thank you!

requested review from @ddieulivol

added 1 commit

• 5c2996d6 - Fix AvoidCreate offences in spec/lib/sidebars

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changed the description

added rspec profiling label

approved this merge request

requested review from @splattael and removed review request for @ddieulivol

added 1 commit

• 164d8525 - Use let instead of let_it_be

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added 1 commit

• 5c970f2e - Fix AvoidCreate offences in spec/lib/sidebars

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mentioned in merge request !122885 (merged)

changed the description