[llvm] [SPIR-V] Add pre-commit CI workflow (PR #74092)

[Natalie Chouinard via llvm-commits]

sudonatalie wrote:

@tstellar We'd like to set up a precommit CI on this experimental backend, so I'm looking for feedback on the right way to accomplish that. I see that this workflow is currently only used for release checks. Does this seem like a reasonable use too or should we look into other options like Buildkite?

https://github.com/llvm/llvm-project/pull/74092