[llvm] [TableGen][NFCI] Speed up generating *GenRegisterInfo.inc files on builds with expensive checks. (PR #67340)

[David Blaikie via llvm-commits]

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

Sounds good to me (if this restores sufficient performance, perhaps you can re-enable the glibcxx debug checks on the buildbot?)

https://github.com/llvm/llvm-project/pull/67340