We run a couple Github only steps in the monolithic-* scripts like
writing to $GITHUB_STEP_SUMMARY and denoting log groups. These can throw
errors when running the scripts locally or as part of other CI systems
(like buildbot). This patch makes it so that we only run these commands
when in the relevant environment. We also add a $POSTCOMMIT_CI check for
groups so that the annotated builder in buildbot works properly with
these scripts.
Reviewers: cmtice, ldionne, Endilll, gburgessiv, Keenuts, dschuff, lnihlen
Pull Request: https://github.com/llvm/llvm-project/pull/152197
0d7c8691fb