Return effective trim point LSN on successful trim request #7989

All 46 tests pass, 1 skipped in 2m 0s

5 files - 2 5 suites - 2 2m 0s ⏱️ - 2m 33s
47 tests ± 0 46 ✅ ± 0 1 💤 ±0 0 ❌ ±0
119 runs - 63 117 ✅ - 62 2 💤 - 1 0 ❌ ±0

Results for commit d55eee4. ± Comparison against earlier commit 97beb75.