regrtest: compute statistics on executed tests

[vstinner]

Feature or enhancement

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Proposal:

regrtest should compute statistics on all executed tests: count successes, failures and skipped.

Linked PRs

• [3.11] gh-108822: Backport libregrtest changes from the main branch #108820
• gh-108822: Add Changelog entry for regrtest statistics #108821
• [3.12] gh-108822: regrtest computes statistics (#108793) #108833
• [3.11] gh-108822: Fix regrtest clear_caches() #109432

[vstinner]

Change merged in the main branch:

• PR: regrtest computes statistics #108793
• commit: d4e534c