Update LLVM to 22.1.0

[dianqk]

Fixes #151813.
Fixes #151946.

[rustbot]

r? @cuviper

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• Owners of files modified in this PR: @cuviper

[rustbot]

⚠️ Warning ⚠️

• Some commits in this PR modify submodules.

  If this was not intentional, see I changed a submodule on accident in the rustc dev guide.

[cuviper]

@bors r+ rollup=never p=1

[rust-bors]

📌 Commit a8e76b9 has been approved by cuviper

It is now in the queue for this repository.

[JonathanBrouwer]

@bors p=6
Scheduling this before the next rollup

[rust-bors]

⌛ Testing commit a8e76b9 with merge 4e392e0...

Workflow: https://github.com/rust-lang/rust/actions/runs/22398948620

[JonathanBrouwer]

Seems to be stuck building LLVM, probably because the caches being reset because this is an LLVM upgrade.
Let's keep this running so we can get as much stuff into cache as possible

[JonathanBrouwer]

6 hours have passed
@bors cancel
Lets retry immediately

[rust-bors]

Auto build cancelled. Cancelled workflows:

• https://github.com/rust-lang/rust/actions/runs/22398948620

The next pull request likely to be tested is #153066.

[rust-bors]

⌛ Testing commit a8e76b9 with merge 1ed4882...

Workflow: https://github.com/rust-lang/rust/actions/runs/22412597744