Try macos-15-intel #1626

Job	Run time
macos-15-intel 1.9	44s
macos-15-intel 2.7	2m 15s
macos-15-intel 2.2	3m 18s
macos-15-intel 3.2	41s
macos-15-intel jruby	1m 54s
macos-15-intel jruby-9.4	1m 45s
macos-15-intel 2.5	2m 23s
macos-15-intel 2.6	3m 18s
macos-15-intel truffleruby	59s
macos-15-intel 3.3	59s
macos-15-intel 2.3	2m 19s
macos-15-intel truffleruby+graalvm-head	4m 47s
macos-15-intel ruby-head	37s
macos-15-intel 3.1	38s
macos-15-intel truffleruby+graalvm	5m 5s
macos-15-intel 2.1	1m 23s
macos-15-intel 2.4	2m 4s
macos-15-intel 2.0	45s
macos-15-intel truffleruby-head	1m 7s
macos-15-intel jruby-head	2m 0s
macos-15-intel 3.4	32s
macos-15-intel 3.0	56s
	40m 29s

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