[llvm] [Github][CI] Add `doc8` for clang-tidy documentation formatting (PR #168827)

[via llvm-commits]

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@@ -94,6 +94,10 @@ COPY --from=llvm-downloader /llvm-extract/LLVM-${LLVM_VERSION}-Linux-X64/bin/cla
 COPY clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py ${LLVM_SYSROOT}/bin/clang-tidy-diff.py
 
 # Install dependencies for 'pr-code-lint.yml' job
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y python3-doc8 && \
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zeyi2 wrote:

Package reference: https://packages.ubuntu.com/noble/python3-doc8

https://github.com/llvm/llvm-project/pull/168827