build(deps): bump third_party/googletest from 1336c4b to 63907e1 (#…

…2019)

Bumps [third_party/googletest](https://github.com/google/googletest) from `1336c4b` to `63907e1`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@1336c4b...63907e1)

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

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

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