[main] (deps): Bump src/submodules/googletest (#63738)

Bumps [src/submodules/googletest](https://github.com/google/googletest) from `7917641` to `50b8600`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@7917641...50b8600)

---
updated-dependencies:
- dependency-name: src/submodules/googletest
  dependency-version: 50b8600c63c5487e901e2845a0f64d384a65f75d
  dependency-type: direct:production
...

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Author: dependabot[bot]