[gtk3] Turn hang into timeout

[dg0yt]

Mitigation for #29018.
From proper failures, we will be able to get CI logs for port gtk3.
CC @BillyONeal.

• 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
• Any fixed CI baseline entries are removed from that file.
• Any patches that are no longer applied are deleted from the port's directory.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is added to each modified port's versions file.

[dg0yt]

Avoiding a hard dependency on this filepath.

[dg0yt]

Change to 5 if you want to verify the effect.

[vicroms]

@ras0219-msft @markle11m @dan-shaw @JavierMatosD

We discussed this PR and feel that this is better implemented as a general build timeout in the vcpkg executable. Any build that is taking longer than the timeout causes vcpkg to stop so that CI has time to upload logs. The timeout should be a user setting and we can pick a value that works for our CI (the team thinks 5 hours should be OK).

@ras0219-msft also points out that the current implementation of the timeout is not good since it couples the implementation of vcpkg_install_meson() and the gtk3 port.

[dg0yt]

When will it come?
This PR is a specific immediate mitigation for a real problem. And it should simply degrade gracefully for most modifications of vcpkg_install_meson.

[dg0yt]

(the team thinks 5 hours should be OK).

Now using 5 hours.

it couples the implementation of vcpkg_install_meson() and the gtk3 port.

Already done in a way which should degrade gracefully.