Generate changelog / Preserve report environment info for in-process toolchains (#3267) * Preserve environment info for in-process toolchains Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Clear the shared diagnoser result queue in the new test BaseMockInProcessDiagnoser.s_completedResults is static and shared by every test using the mock in-process diagnoser, so a test that leaves entries behind breaks the next one's exact-collection assert. The other consumers already clear ...

Generate changelog / Preserve report environment info for in-process toolchains (#3267) * Preserve environment info for in-process toolchains Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Clear the shared diagnoser result queue in the new test BaseMockInProcessDiagnoser.s_completedResults is static and shared by every test using the mock in-process diagnoser, so a test that leaves entries behind breaks the next one's exact-collection assert. The other consumers already clear ... #622