[Eng]: module not built in CI

### Description

There is a special case that a modified module may not be built in CI. For example, [this PR](https://github.com/Azure/azure-powershell/pull/19154) moved StorageMover module from generation branch to main branch, but the CI [did not build StorageMover](https://dev.azure.com/azure-sdk/public/_build/results?buildId=1763843&view=logs&j=2f7369d1-fb97-5262-a571-f4e9c996b7d1&t=c65099ae-0a9a-5c25-4721-3560ad0166d5).

This problem only happens when the PR updates certain files (like tools folder) that triggers a "full" build - a selected list of modules are to be built, but the changed module is ignored.