Summary of Changes

The $table->load check for deleting group rows has been moved above the loop that deletes them.
Please refer to #33771 for the reason behind this.
This PR mimics what was done for Content Map's Delete All Bug (#33771) to User Groups where a similar bug was left un-noticed

Testing Instructions

1. Visit Backend -> Users -> User Groups
2. Add 4 new groups where 2 groups are the parent and 2 are their child:

- B
:  - B1
- C
:  - C1

3. Select all of these items as shown in the gif below. Order is Important: Parent (B) -> It's Child (B1) -> Parent (C) -> It's Child (C1)
4. Proceed to Delete them

Before the PR: only the first Parent-Child pair would be deleted and the 2nd Parent-Child was skipped. This happened because the B1 was deleted with B (it's parent) and the loop returned false when it iterated over B1 as it was no longer present in the table.
After the PR: all selected groups will be deleted.

Actual result BEFORE applying this Pull Request

Expected result AFTER applying this Pull Request

Documentation Changes Required

None