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

Bumps [src/submodules/googletest](https://github.com/google/googletest) from `a7f443b` to `34ad51b`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@a7f443b...34ad51b)

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

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