Multiple workflows being created when the default approver is changed to a non-admin

[tgolen]

cc @aldo-expensify

Note: I was unable to reproduce this on staging, I could only reproduce it locally.

Action Performed:

1. Create a workspace as User A
2. Invite User B and User C to the workspace
3. Go to more settings
4. Turn on workflows
5. Go to workflows
6. Turn on Add Approvals
7. Select the first workflow and change the approver from User A to User B

Expected Result:

There should only be a single workflow with User B as the approver

Actual Result:

There are two workflows. One with User B as the approver and one with User A as the approver.

Screenshots/Videos

Add any screenshot/video evidence

https://github.com/user-attachments/assets/51acef0d-1acc-4eb8-aed4-f2ca272083b4