feat!: rename zkevm-llvm to zksync-llvm

[antonbaliasnikov]

What ❔

• Rename zkevm-llvm to zksync-llvm
• Make tests independent from LLVM commit sha

Why ❔

Fixes CPR-1674

To correspond to our new naming conventions and stabilize tests execution.

Checklist

• PR title corresponds to the body of PR.
• Documentation comments have been added / updated.
• Code has been formatted via cargo fmt and checked with cargo clippy.

[antonbaliasnikov]

To be merged only after we pin versions of the builder in our other repositories.

PRs to pin versions:

• ci: pin version of the llvm builder era-compiler-llvm#533
• ci: pin version of the llvm builder era-compiler-solidity#70
• ci: pin version of the llvm builder era-compiler-vyper#51
• ci: pin version of the llvm builder era-compiler-tester#18

[hedgar2017]

Hm, the MUSL downloading failed again somehow.

[antonbaliasnikov]

Hm, the MUSL downloading failed again somehow.

Yeah :(

My logic was not correct, this should fix:
#28