[llvm-branch-commits] [CI] Remove Style from generate_test_report_lib (PR #147791)

[Aiden Grossman via llvm-branch-commits]

https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/147791

This is another Buildkite relic that we can get rid of now to simplify
things a bit.