Pin the AMQP test broker hash to protect against changes

[LarryOsterman]

Pull Request Checklist

Please leverage this checklist as a reminder to address commonly occurring feedback when submitting a pull request to make sure your PR can be reviewed quickly:

See the detailed list in the contributing guide.

• C++ Guidelines
• Doxygen docs
• Unit tests
• No unwanted commits/changes
• Descriptive title/description
  • PR is single purpose
  • Related issue listed
• Comments in source
• No typos
• Update changelog
• Not work-in-progress
• External references or docs updated
• Self review of PR done
• Any breaking changes?

[azure-pipelines]

Azure Pipelines:
Successfully started running 2 pipeline(s).
8 pipeline(s) were filtered out due to trigger conditions.
There may be pipelines that require an authorized user to comment /azp run to run.

[azure-pipelines]

Azure Pipelines:
Successfully started running 2 pipeline(s).
8 pipeline(s) were filtered out due to trigger conditions.
There may be pipelines that require an authorized user to comment /azp run to run.

[Copilot]

Pull request overview

This PR updates the azure-core-amqp test infrastructure to reduce sensitivity to external AMQP broker/environment changes by adjusting native-broker unit tests and the PowerShell test-broker setup script.

Changes:

• Switched native-broker unit test setup failures from GTEST_FATAL_FAILURE_ to GTEST_SKIP_ when TEST_BROKER_ADDRESS is not present.
• Updated Test-Setup.ps1 to re-clone the azure-amqp test broker repo and attempt to pin it to a specific commit hash.
• Adjusted Test-Setup.ps1 broker build/run flow (including macOS early-exit behavior).

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
sdk/core/azure-core-amqp/test/ut/session_tests.cpp	Skip native-broker tests when TEST_BROKER_ADDRESS is missing.
sdk/core/azure-core-amqp/test/ut/message_sender_receiver.cpp	Skip native-broker tests when TEST_BROKER_ADDRESS is missing.
sdk/core/azure-core-amqp/test/ut/management_tests.cpp	Skip native-broker tests when TEST_BROKER_ADDRESS is missing.
sdk/core/azure-core-amqp/test/ut/connection_tests.cpp	Skip native-broker tests when TEST_BROKER_ADDRESS is missing.
sdk/core/azure-core-amqp/test/ut/claim_based_security_tests.cpp	Skip native-broker tests when TEST_BROKER_ADDRESS is missing.
sdk/core/azure-core-amqp/Test-Setup.ps1	Reworked test-broker setup to (intended) pin a repo hash and change broker startup behavior.