build(deps): bump third_party/googletest from 305e5a2 to a7f443b

Bumps [third_party/googletest](https://github.com/google/googletest) from `305e5a2` to `a7f443b`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@305e5a2...a7f443b)

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

Signed-off-by: dependabot[bot] <[email protected]>