OCaml: Add neocaml (#5014) #6328

Job	Run time
test (ubuntu-latest, 30.2, false)	2m 21s
test (ubuntu-24.04-arm, 28.2, false)	4m 40s
test (macos-latest, snapshot, true)	4m 17s
test (ubuntu-24.04-arm, 30.2, false)	3m 53s
test (ubuntu-24.04-arm, 29.4, false)	4m 4s
test (ubuntu-latest, snapshot, true)	1m 29s
test (macos-latest, 29.4, false)	5m 53s
test (windows-latest, 28.2, false)	4m 49s
test (ubuntu-24.04-arm, snapshot, true)	5m 22s
test (macos-latest, 28.2, false)	5m 53s
test (ubuntu-latest, 29.4, false)	2m 25s
test (ubuntu-latest, 28.2, false)	2m 59s
test (windows-latest, 29.4, false)	3m 35s
test (windows-latest, 30.2, false)	3m 26s
test (windows-latest, snapshot, true)	4m 3s
test (macos-latest, 30.2, false)	5m 15s
	1h 4m 24s

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