Resolve "Reject person from limited capacity lab"

What does this mr do?

Allows teachers to remove a person from a random selection lab.

Screenshots

Teacher view

Student view

before

after

Does this MR meet the acceptance criteria?

• I have added a changelog entry to reflect the significant changes I made.
• Tests were created to test the feature.
• I have updated the documentation accordingly.
• I adhere to the style guide. Closes #529 (closed)