Bulk removal of members in projects/groups - frontend

Problem to solve

Removing many users from a group or project via the UI is hard. We should take the design we create in #5532 and apply it to the Members screens in projects/groups to make bulk editing of members easy.

Proposal

• Select multiple members and apply a removal or role change to them.

Iteration plan

• Implement Bulk removal for direct members

Note: Inherited members will not be handled at this time

Availability and Testing

• Please run package-and-qa for MR to ensure no regressions occur.
• No new E2E test needed at this time- unit/integration coverage should suffice. Please also consider adding a feature spec that tests bulk members removal in the UI as well.