E2E: Search member before performing the next action

What does this MR do and why?

Describe in detail what your merge request does and why.

If there are too many group or projects members, the member that test is interested in might be on another page on the group/project members page. This MR updates the tests to search for the member before performing any action on the member row.

Also, un-quarantines a test.

Closes #351160 (closed), #350598 (closed)

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