[llvm] workflows/release-tasks: Setup FileCheck and not for release-lit (PR #66799)

[Tulio Magno Quites Machado Filho via llvm-commits]

tuliom wrote:

> @tuliom planning on merging this - or do you need someone with access to do that?

@tru I'm doing this now. Thanks!

https://github.com/llvm/llvm-project/pull/66799