CI: Add GitHub Actions ppc64le/s390x cases #1614

Job	Run time
ubuntu-24.04-s390x	1m 59s
ubuntu-24.04-ppc64le	1m 37s
ruby-versions / Generate Ruby versions	5s
openssl-3.2.4	1m 21s
openssl-3.0.16	1m 31s
openssl-1.1.1w	1m 23s
openssl-3.4.1	1m 46s
openssl-3.1.8	1m 57s
openssl-3.5.0	1m 23s
libressl-4.0.0	3m 12s
openssl-3.3.3	1m 34s
libressl-3.9.2	1m 54s
openssl-3.5.0 without legacy provider	1m 19s
libressl-4.1.0	51s
aws-lc-latest	3m 47s
openssl-master	3m 56s
ubuntu-latest 2.7	1m 2s
ubuntu-latest 3.1	1m 17s
ubuntu-latest 3.3	1m 7s
ubuntu-latest head	52s
ubuntu-latest 3.4	1m 9s
ubuntu-latest truffleruby	1m 57s
ubuntu-latest 3.2	1m 23s
macos-latest 2.7	1m 57s
macos-latest 3.4	1m 10s
macos-latest 3.0	1m 7s
macos-latest 3.3	53s
macos-latest 3.1	1m 0s
ubuntu-latest truffleruby-head	1m 57s
macos-latest 3.2	2m 12s
ubuntu-latest 3.0	53s
macos-latest truffleruby	2m 27s
macos-latest head	1m 29s
windows-latest 3.0	4m 3s
windows-latest 3.2	3m 11s
windows-latest 2.7	3m 56s
windows-latest 3.3	3m 40s
macos-latest truffleruby-head	1m 26s
windows-latest ucrt	2m 45s
windows-latest 3.4	2m 59s
windows-latest mswin	2m 51s
windows-latest 3.1	3m 48s
windows-latest head	2m 40s
	1h 24m 46s

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