Integration publishing should honor `BuildTargetingString`

[scbedd]

The python builds have the concept of BuildTargetingstring queue time variable that can narrow the scope of a build to select artifacts.

Unfortunately, when we use it to get something like a single dev publish of azure-storage-blob out the door, we crash after uploading the target, because the expected artifacts aren't present in their folder.

Need to resolve this assumption and ensure it doesn't crash.

[azure-sdk]

Label prediction was below confidence level 0.6 for Model:ServiceLabels: 'Azure.Core:0.3575137,Storage:0.3024703,azure-spring:0.07378103'