Remove the explicit Clang version from GitHub actions.
Remove the explicit Clang version from GitHub actions.

Clang 14 is not available in ubuntu-latest at the moment, but will be soon:

https://github.blog/changelog/2022-08-09-github-actions-ubuntu-22-04-is-now-generally-available-on-github-hosted-runners/

We drop the explicit version pin and use the latest release.

PiperOrigin-RevId: 473872490

google/fuzztest,google/fuzztest