Add new OTEL Metrics source that creates events #747

All 6 585 tests pass in 42m 21s

  2 050 files   2 050 suites 42m 21s ⏱️
  6 585 tests   6 585 ✔️ 0 💤 0 ❌
17 253 runs 17 253 ✔️ 0 💤 0 ❌

Results for commit 74d8271.