reorganise RHExtension loading and trigger load in separate virtual t… #8060

All 3 766 tests pass, 193 skipped in 4m 8s

1 files ±0 1 488 suites ±0 4m 8s ⏱️ -26s
3 959 tests ±0 3 766 ✅ ±0 193 💤 ±0 0 ❌ ±0
4 096 runs ±0 3 868 ✅ ±0 228 💤 ±0 0 ❌ ±0

Results for commit 51cdefd. ± Comparison against earlier commit c618c11.