clang-format 11 is no longer available via brew

[paulb777]

Bugzilla Link	49996
Version	11.0
OS	All

Extended Description

The missing clang-format 11 on brew is problematic for our CI because of #49339 in clang-format 12

[paulb777]

Our CI broke today because clang-format 13 disappeared from brew.

[dconeybe]

Again today, our CI broke because clang-format@14 disappeared from brew.

[rymiel]

I'm not really sure what is expected here, LLVM doesn't maintain anything related to external package managers (except for maybe apt and dnf listed on the home page?).
If you have a problem with how a package manager does things, maybe complain to the package manager?

[paulb777]

Opened Homebrew/homebrew-core#114628

[JOE1994]

Closing as this seems unactionable from the LLVM side,
but please re-open if necessary.