[release/6.0] (deps): Bump src/submodules/googletest (#39260)

Bumps [src/submodules/googletest](https://github.com/google/googletest) from `bb92160` to `6b74da4`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](https://github.com/google/googletest/compare/bb9216085fbbf193408653ced9e73c61e7766e80...6b74da4757a549563d7c37c8fae3e704662a043b

)

---
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>

googletest @ 6b74da47

-Subproject commit bb9216085fbbf193408653ced9e73c61e7766e80
+Subproject commit 6b74da4757a549563d7c37c8fae3e704662a043b