audit: deprecate requirements in core

[jonchang]

This strict audit ensures that new formulae that depend on Requirements like :x11, :java, and :osxfuse are not introduced into homebrew/core.

• :java formulae were mostly migrated over to the brewed version earlier this year. The only remaining formulae are for Java 1.8, which is being tracked here: openjdk@8 migration tracking issue homebrew-core#63290
• :x11 formulae can now be migrated over to e.g. depends_on "libx11". x11 migration tracking issue homebrew-core#64166
• :osxfuse formulae will need to be disabled or deleted, as the licensing has changed and there is no longer a way to build it from source anyway. The versions that could theoretically be built from source and distributed with Homebrew will soon not work on supported macOS versions. Deprecate FUSE formulae. homebrew-core#64491

cc @homebrew/core

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes? Here's an example.
• Have you successfully run brew style with your changes locally?
• Have you successfully run brew tests with your changes locally?
• Have you successfully run brew man locally and committed any changes?

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[MikeMcQuaid]

• :x11 formulae can now be migrated over to e.g. depends_on "libx11". No tracking issue yet as there are some things that still need to be worked out, but an example migration is here: Homebrew/homebrew-core#64165

Wow, I didn't know that was now a thing. Great work everyone involved with this 👏🏻

[MikeMcQuaid]

Thanks @jonchang!