jextract: add support for implementing Swift protocols in Java #1107

Job	Run time
Documentation check (6.2, jammy, corretto)	4m 38s
Benchmark (JMH) (jammy swift:6.2 jdk:corretto)	8m 50s
Test (Swift) (jammy swift:6.1.3 jdk:corretto)	5m 6s
Test (Swift) (macos swift:6.2 jdk:corretto)	3m 9s
Test (Swift) (jammy swift:nightly jdk:corretto)	6m 0s
Sample SwiftJavaExtractJNISampleApp (jammy swift:6.2 jdk:corretto)	5m 33s
Test (Java) (jammy swift:6.2 jdk:corretto)	2m 41s
Sample SwiftJavaExtractJNISampleApp (macos swift:6.2 jdk:corretto)	6m 43s
Benchmark (Swift) (jammy swift:6.2 jdk:corretto)	3m 53s
Sample SwiftJavaExtractJNISampleApp (jammy swift:nightly jdk:corretto)	11m 31s
Test (Java) (macos swift:6.2 jdk:corretto)	3m 0s
Test (Java) (jammy swift:nightly jdk:corretto)	2m 47s
Test (Swift) (jammy swift:6.2 jdk:corretto)	4m 40s
Sample SwiftJavaExtractJNISampleApp (jammy swift:6.1.3 jdk:corretto)	11m 32s
soundness / Unacceptable language check	9s
soundness / License headers check	9s
soundness / Broken symlinks check	5s
soundness / Shell check	18s
soundness / Format check	-1s
soundness / API breakage check	-1s
soundness / Python lint check	9s
soundness / Documentation check	-1s
soundness / YAML lint check	5s
	1h 20m 55s

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