Additional tests needed for things that needed to be hotfixed in M2

[dotnet-bot]

Migrated from https://github.com/dotnet/core-eng/issues/13262

@missymessa wrote:

• [x] Test to ensure we fail the check if any pipeline in the build fails, and not just the last one
• [ ] Test to ensure we only get checks that are from Azure Pipelines app instead of all (so we're not trying to parse the external ID from non Azure Pipeline check runs)
• [ ] Test to ensure we're parsing the check status correctly
• [ ] Integration test for the blob contextual storage exceptions when Acquiring the lease