Implemented StableApiDefinition::rstring_interned_p methods for TruffleRuby. #873

Job	Run time
Bundle install in Dockerfile	1m 3s
oxi-test (ruby=3.0, os=ubuntu-latest)	1m 6s
oxi-test (ruby=3.2, os=ubuntu-latest)	1m 16s
oxi-test (ruby=3.3, os=ubuntu-latest)	1m 36s
oxi-test (ruby=3.0, os=windows-latest)	5m 34s
oxi-test (ruby=3.2, os=windows-latest)	10m 0s
oxi-test (ruby=3.3, os=windows-latest)	11m 22s
oxi-test (ruby=3.0, os=macos-latest)	1m 14s
oxi-test (ruby=3.2, os=macos-latest)	52s
oxi-test (ruby=3.3, os=macos-latest)	57s
magnus-0.5 (ruby=3.0, os=ubuntu-latest)	1m 34s
magnus-0.5 (ruby=3.2, os=ubuntu-latest)	1m 25s
magnus-0.5 (ruby=3.3, os=ubuntu-latest)	1m 17s
magnus-0.5 (ruby=3.0, os=windows-latest)	6m 17s
magnus-0.5 (ruby=3.2, os=windows-latest)	6m 8s
magnus-0.5 (ruby=3.3, os=windows-latest)	10m 6s
magnus-0.5 (ruby=3.0, os=macos-latest)	1m 10s
magnus-0.5 (ruby=3.2, os=macos-latest)	1m 13s
magnus-0.5 (ruby=3.3, os=macos-latest)	1m 1s
magnus-head (ruby=3.0, os=ubuntu-latest)	2m 22s
magnus-head (ruby=3.2, os=ubuntu-latest)	2m 36s
magnus-head (ruby=3.3, os=ubuntu-latest)	2m 25s
magnus-head (ruby=3.0, os=windows-latest)	10m 41s
magnus-head (ruby=3.2, os=windows-latest)	9m 41s
magnus-head (ruby=3.3, os=windows-latest)	12m 18s
magnus-head (ruby=3.0, os=macos-latest)	1m 36s
magnus-head (ruby=3.2, os=macos-latest)	1m 32s
magnus-head (ruby=3.3, os=macos-latest)	1m 24s
	1h 49m 46s

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