[CI] fast H2rootcheck

[ferdymercury]

Fast testing platform running only h2root for verifying failure rate.

to verify on several remote platforms at once multiple times

Since h2root might fail only 1 out of every 5 times, it's interesting to have a fast tool to rerun 5 or 10 times on multi-platform but consuming less resources.

fyi @guitargeek

TODO review Windows is still OFF

[github-actions[bot]]

Test Results

21 files  21 suites   9s ⏱️  1 tests  0 ✅ 0 💤 1 ❌ 19 runs  17 ✅ 0 💤 2 ❌

For more details on these failures, see this check.

Results for commit 9d5af992.

:recycle: This comment has been updated with latest results.