Migrate to versioned formulae (homebrew)

[rakaramos]

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This is a huge clean up to provide a tag that goes along with Xcode version and is always compatible with it.

Xcode Release	Swift Release Tag	SwiftSyntax Release Tag
Xcode 14.3	swift-5.8-RELEASE	508.0.0
Xcode 14.0	swift-5.7-RELEASE	0.50700.1
Xcode 13.3	swift-5.6-RELEASE	0.50600.1
Xcode 13.0	swift-5.5-RELEASE	0.50500.0
Xcode 12.5	swift-5.4-RELEASE	0.50400.0
Xcode 12.0	swift-5.3-RELEASE	0.50300.0
Xcode 11.4	swift-5.2-RELEASE	0.50200.0

clients then could install the proper version:

brew install muter-mutation-testing/formulae/muter@15