Remove advanced usages of deprecated .contains() method

What does this MR do?

.contains will be deprecated in @vue/test-utils 1.x. This MR contains removing of this deprecated method in complex cases

See !40655 (merged) for trivial ones

This MR was mainly generated by extremely simple regexp

([^t])\.contains\(([^)]+)\) ==> $1.find($2).exists()

why [^t]? Dump way to exclude classList.contains calls. After that tiny manual intervention was performed, all described in code comments

Screenshots

N/A

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done