[llvm-branch-commits] [CI] Move platform specific test report titles to python (PR #152198)

[Aiden Grossman via llvm-branch-commits]

https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/152198

This patch moves the platform specific test report titles to the
generate_test_report_github.py script. This means that the functions in
the monolithic-* scripts are exactly the same now and can be moved into
a separate script that can be shared between the two scripts.