ci: fix bazel build

[c8ef]

Why

The bazel build failed.

What is changing

• Fix some warning about signed-compare, reorder, and function return type mismatch.
• Update clang-format since the default one in CI is TOO old(14).

Example

[github-actions]

for detail, goto summary download Artifacts base-ylt-cov-report(base commit coverage report) and ylt-cov-report(current pull request coverage report)

[github-actions]

for detail, goto summary download Artifacts base-ylt-cov-report(base commit coverage report) and ylt-cov-report(current pull request coverage report)

[github-actions]

for detail, goto summary download Artifacts base-ylt-cov-report(base commit coverage report) and ylt-cov-report(current pull request coverage report)

[github-actions]

for detail, goto summary download Artifacts base-ylt-cov-report(base commit coverage report) and ylt-cov-report(current pull request coverage report)

[github-actions]

for detail, goto summary download Artifacts base-ylt-cov-report(base commit coverage report) and ylt-cov-report(current pull request coverage report)

[c8ef]

The CI looks all good now.
@qicosmos @poor-circle

[poor-circle]

lgtm