[C#][Release] Run sourcelink verification for local build so we can find errors on nightlies or maintenance branch

[raulcd]

Describe the enhancement requested

During the creation of the first RC for 15.0.0 we realized that there was an issue with the C# verification, it failed due to:
#39598
#39605
As an improvement we should also run sourcelink verification when SOURCE_KIND is local so the error appears on maintenance branch and nightly builds and we don't have to wait for a Release Candidate to find issues.

See the above PR and issue for more details.

Component(s)

C#, Release