[llvm] workflows/release-binaries: Disable Flang on x86_64 macOS (PR #127216)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 approved this pull request.

LGTM.

I'm wondering if compiling just uses too much RAM and it goes to swap?

https://github.com/llvm/llvm-project/pull/127216