[main] Poison diff checks failing

[ellahathaway]

Link to build

[MichaelSimons]

Looking at latest build, it appears that the report is non-deterministic in its ordering causing the diff to fail. A couple closely related issues are:

• Poison baseline should ignore package version diffs #5309
• Full file paths are included in the baseline. This breaks when running the tests on different machines w/different repo paths.