Separate test from runtime dependencies in Formula#to_hash

[Rylan12]

Fixes #13891

It turns out that we don't separate test dependencies from runtime dependencies in the fromula JSON API like we do for build and other types of dependencies. This means that there's no way to differentiate between test and runtime deps when loading a formula from the API. This PR adds a new test_dependencies element to the JSON API and moves the test dependencies there from the dependencies element.

[BrewTestBot]

Review period skipped due to critical label.

[Bo98]

Do we want to add :test here?

brew/Library/Homebrew/formulary.rb

Lines 197 to 201 in 8de3e93

	[:build, :recommended, :optional].each do |type|
	json_formula["#{type}_dependencies"].each do |dep|
	next if uses_from_macos_names.include? dep
	depends_on dep => type

Though it might have to be a separate PR after the JSON is regenerated.

[MikeMcQuaid]

Nice work!

[Rylan12]

Do we want to add :test here?

Good point, but I think it needs to happen once the API has been updated