Use the parent element to find elements to remove the child

What does this MR do?

Use the parent element to find elements to remove the child in the test to archive #333068 (closed) in CE and/or GitLab Free (non- Enterprise Edition).

The test changed in this MR was introduced in !43522 (merged).

Screenshots (strongly suggested)

n/a

Does this MR meet the acceptance criteria?

Conformity

• I have included changelog trailers, or none are needed. (Does this MR need a changelog?)
• I have properly separated EE content from FOSS, or this MR is FOSS only. (Where should EE code go?)
• I have self-reviewed this MR per code review guidelines.
• I have followed the style guides.

Related to #333068 (closed)