Tests

adds macos-15-intel to build matrix (#389) #332

Job	Run time
macos-15-intel - truffleruby+graalvm	6h 0m 22s
macos-14 - truffleruby+graalvm	2m 35s
macos-15 - truffleruby+graalvm	3m 53s
ubuntu-24.04 - truffleruby+graalvm	3m 14s
macos-14 - ruby-3.1	28s
macos-14 - ruby-3.2	44s
macos-15-intel - ruby-3.1	1m 15s
macos-14 - ruby-3.4	28s
macos-15 - ruby-3.3	29s
macos-15 - ruby-3.1	39s
macos-15 - ruby-4.0	26s
macos-14 - ruby-3.3	28s
macos-15-intel - ruby-3.2	1m 15s
macos-14 - ruby-4.0	30s
macos-15-intel - ruby-3.4	53s
macos-15 - ruby-3.2	28s
macos-15-intel - ruby-3.3	1m 7s
macos-15-intel - ruby-4.0	1m 7s
linux-ubuntu-24.04 - ruby-3.1 - gnu	51s
linux-ubuntu-24.04 - ruby-3.3 - musl	57s
linux-ubuntu-24.04-arm - ruby-3.1 - musl	49s
linux-ubuntu-24.04 - ruby-3.1 - musl	51s
linux-ubuntu-24.04-arm - ruby-3.4 - musl	54s
linux-ubuntu-24.04 - ruby-3.3 - gnu	1m 1s
linux-ubuntu-24.04 - ruby-4.0 - musl	53s
linux-ubuntu-24.04-arm - ruby-3.1 - gnu	58s
linux-ubuntu-24.04-arm - ruby-3.3 - musl	53s
linux-ubuntu-24.04-arm - ruby-3.2 - gnu	56s
linux-ubuntu-24.04-arm - ruby-4.0 - gnu	1m 4s
linux-ubuntu-24.04 - ruby-3.2 - gnu	53s
linux-ubuntu-24.04-arm - ruby-4.0 - musl	56s
linux-ubuntu-24.04 - ruby-3.4 - gnu	1m 1s
linux-ubuntu-24.04 - ruby-3.4 - musl	58s
linux-ubuntu-24.04-arm - ruby-3.2 - musl	49s
linux-ubuntu-24.04 - ruby-4.0 - gnu	57s
linux-ubuntu-24.04-arm - ruby-3.4 - gnu	1m 8s
linux-ubuntu-24.04-arm - ruby-3.3 - gnu	1m 8s
macos-15 - ruby-3.4	34s
linux-ubuntu-24.04 - ruby-3.2 - musl	51s
	6h 39m 43s

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