[jacodb-core] In JarFacade, avoid caching JarEntries returned by JarF… #1959

All 620 tests pass, 8 skipped in 5m 17s

72 files ±0 72 suites ±0 5m 17s ⏱️ +5s
628 tests +1 620 ✅ +1 8 💤 ±0 0 ❌ ±0
698 runs +1 690 ✅ +1 8 💤 ±0 0 ❌ ±0

Results for commit f66dd8c. ± Comparison against earlier commit ad9d047.