[main] (deps): Bump src/submodules/googletest (#54552)

Bumps [src/submodules/googletest](https://github.com/google/googletest) from `e1a38bc` to `c231e6f`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@e1a38bc...c231e6f)

---
updated-dependencies:
- dependency-name: src/submodules/googletest
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]