[jextract] Rework translation #478

Job	Run time
Java tests (swift:6.0.2 jdk:Corretto os:jammy)	5m 1s
Swift tests (swift:6.0.2 jdk:Corretto os:jammy)	2m 59s
Verify Samples (swift:6.0.2 jdk:Corretto os:jammy)	15m 22s
soundness / License headers check	6s
soundness / Unacceptable language check	2s
soundness / API breakage check	0s
soundness / Documentation check	32s
soundness / Broken symlinks check	3s
soundness / Format check	0s
soundness / Python lint check	5s
soundness / Shell check	29s
soundness / YAML lint check	5s
	24m 44s

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