Update dependency com_google_googletest to v1.15.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
com_google_googletest	http_archive	minor	v1.14.0 -> v1.15.0

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Release Notes

google/googletest (com_google_googletest)

v1.15.0

Compare Source

Release Notes

GoogleTest will not accept patches of new features to the v1.15.x branch.
We recommend building GoogleTest from the latest commit instead.
Exceptional critical bug fixes may be considered.

C++ Language Support

• GoogleTest requires at least C++14 and follows Google's Foundational C++ Support Policy. See this table for a list of currently supported versions compilers, platforms, and build tools.

Notable Changes

• Bzlmod is now officially supported (previously it was supported by the community). Note that it may take several days after the release for it to become available in the Bazel Central Registry.
• Many bug fixes

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Configuration

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🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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