[clang] [clang-format] Apply SpaceBeforeInheritanceColon to enum underlying types (PR #189011)

[Björn Schäpers via cfe-commits]

https://github.com/HazardyKnusperkeks approved this pull request.

For future reference, please just add commits (and do not rebase), that way one can review incrementally. On merge all commits of a PR will be squashed, rebased and then pushed.

https://github.com/llvm/llvm-project/pull/189011