Assert-MockCalled being deprecated in Pester 5

### Description
[Assert-MockCalled](https://pester.dev/docs/commands/Assert-MockCalled) is being deprecated in Pester 5:
> THIS COMMAND IS OBSOLETE AND WILL BE REMOVED SOMEWHERE DURING v5 LIFETIME, USE Should -Invoke INSTEAD.

### Describe the solution you'd like
Remove use of Assert-MockCalled in all Pester 5 use cases throughout Catesta code base
