[ci] Add Fedora Rawhide special build with Python debug interpreter

[guitargeek]

Like this, we have a Python debug interpreter run in our CI and also test the cutting edge of Fedora development.

Quoting from the Python docs:

You should always develop under a pydebug build of CPython (the only instance of when you shouldn’t is if you are taking performance measurements). Even when working only on pure Python code the pydebug build provides several useful checks that one should not skip.

[github-actions]

Test Results

    21 files      21 suites   3d 15h 55m 7s ⏱️
 3 089 tests  3 077 ✅ 0 💤 12 ❌
63 155 runs  63 143 ✅ 0 💤 12 ❌

For more details on these failures, see this check.

Results for commit 2a3367d.

♻️ This comment has been updated with latest results.