Add GLFW feature to Dawn port

[oliverdixon]

This adds a feature [glfw] to the Dawn port to set the DAWN_USE_GLFW cache variable. It requires patching an upstream CMakeLists.txt file, as Dawn expects GLFW3 to be cloned in-source as a submodule. The patch makes it use the system GLFW (provided as a vcpkg transitive dependency) instead.

Fixes #49973

• Changes comply with the maintainer guide.
• SHA512s are updated for each updated download.
• The "supports" clause reflects platforms that may be fixed by this new version, or no changes were necessary.
• Any fixed CI baseline and CI feature baseline entries are removed from that file, or no entries needed to be changed.
• All patch files in the port are applied and succeed.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Exactly one version is added in each modified versions file.

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