[llvm] workflows: Fixes for building the release binaries (PR #83694)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

> The free runners still aren't powerful enough to do the release builds in less than 6 hours, so we have to keep using the non-free builders for this. The cache filling stage sill saves us money, so I think we have to keep it.

Ah. Didn't realize that. Keeping it around makes sense then.



https://github.com/llvm/llvm-project/pull/83694