[Release][C#] Source verification for C# on 15.0.0 Release Candidate fails with `file does not exist: artifacts/Apache.Arrow/Release/netstandard1.3/Apache.Arrow.pdb`

[raulcd]

Describe the bug, including details regarding any error messages, version, and platform.

I have been executing the source verification jobs both on the nightly jobs and the maintenance branch and I haven't found any prior issues but as soon as I've created the Release Candidate 0 for 15.0.0 all the C# verification jobs for the sources fail with the following error:

  Successfully created package '/tmp/arrow-15.0.0.NZGxf/apache-arrow-15.0.0/csharp//artifacts/Apache.Arrow.Flight.Sql/Release/Apache.Arrow.Flight.Sql.15.0.0.snupkg'.
file does not exist: artifacts/Apache.Arrow/Release/netstandard1.3/Apache.Arrow.pdb
Failed to verify release candidate. See /tmp/arrow-15.0.0.NZGxf for details.

The Release Candidate 0 jobs that are failing can be seen here: https://github.com/apache/arrow/pull/39597#issuecomment-1890973621 and one example of failed job here: https://github.com/ursacomputing/crossbow/actions/runs/7519893060/job/20468954451

The maintenance branch successful jobs can be seen here: https://github.com/apache/arrow/pull/39545#issuecomment-1889979579

Component(s)

C#, Release

[raulcd]

@CurtHagenlocher @eerhardt any idea what might be going wrong on the C# verification?

[CurtHagenlocher]

As 1.3 has been obsolete for some time, I removed support for it. Am on a plane now but will try to understand the failure later today or tomorrow.

[raulcd]

Thanks @CurtHagenlocher no worries. I'll try to investigate tomorrow too if I can see what is going on but knowing that you removed support for 1.3 is a huge pointer to where to investigate. Thank you very much!

[raulcd]

~@kou I plan to merge this. I have created https://github.com/apache/arrow/issues/39631 to follow up the local build issue. Let me know if you are ok with merging it as is to add to RC1~

I meant to post on the PR not the issue :)