[v2.7] toolchain: Move extra warning options to toolchain abstraction #91496

All 3 205 tests pass, 571 skipped in 1h 27m 39s

3 776 tests ±0 3 205 ✔️ +1 1h 27m 39s ⏱️ - 2m 35s
  389 suites ±0   571 💤 ±0
    10 files ±0       0 ❌ - 1

Results for commit 6e4f192. ± Comparison against earlier commit 9a61611.