Clang-tidy is flakey on `source/common/http/http1/balsa_parser.h`

[phlax]

There is a file that fails clang-tidy but as it is only run as clang-tidy-diff it only surfaces when the file is touched.

Ci log

Running clang-tidy-diff against HEAD^ (7850b6bb6494e3bfc093b1aff20282ab30b67940), current HEAD (bb554f53ad8d3a2a2ae4cbd7102a3e20ae00b558)
/build/tmp/_bazel_envoybuild/b570b5ccd0454dc9af9f65ab1833764d/execroot/envoy/source/common/http/http1/balsa_parser.h:61:8: error: invalid case style for function 'ProcessHeadersOrTrailersImpl' [readability-identifier-naming,-warnings-as-errors]
  void ProcessHeadersOrTrailersImpl(const quiche::BalsaHeaders& headers);
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
       processHeadersOrTrailersImpl

14982 warnings generated.

43352 warnings generated.

54685 warnings generated.

Writing fixes to clang-tidy-fixes.yaml ...
clang-tidy check failed, potentially fixed by clang-apply-replacements:
Diagnostics:
- BuildDirectory: /build/tmp/_bazel_envoybuild/b570b5ccd0454dc9af9f65ab1833764d/execroot/envoy
  DiagnosticMessage:
    FileOffset: 2637
    FilePath: source/common/http/http1/balsa_parser.h
    Message: invalid case style for function 'ProcessHeadersOrTrailersImpl'
    Replacements:
    - FilePath: source/common/http/http1/balsa_parser.h
      Length: 28
      Offset: 2637
      ReplacementText: processHeadersOrTrailersImpl
  DiagnosticName: readability-identifier-naming
  Level: Warning
MainSourceFile: ''

Ci failure

https://dev.azure.com/cncf/envoy/_build/results?buildId=128469&view=logs&j=b7634614-24f3-5416-e791-4f3affaaed6c&t=21e6aa7d-f369-5abd-5e4e-e888cac18e9c&l=507

Contributors that may have further context

cc @bencebeky

[bencebeky]

/assign @bencebeky

[phlax]

thanks @bencebeky !

[phlax]

related to #24485