[ci] Report failure in cppyy tests except runxfail/valgrind

[aaronj0]

No description provided.

[aaronj0]

OS X arm jobs break while testing cppyy with libc++abi: terminating due to uncaught exception of type int. On cppyy-backend, we have kept the x86 jobs which atleast run the entire test suite (with 33 failures with libc++ not handling std library types correctly).

I would propose not spending too much time on the OS X jobs as they seem to be a time sink... This PR fixes the regression of the cppyy workflow with clang 16,17 and 18 on Linux

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.90%. Comparing base (f93e7b6) to head (0e185f8).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #239      +/-   ##
==========================================
- Coverage   87.65%   78.90%   -8.75%     
==========================================
  Files           4        8       +4     
  Lines        1742     3096    +1354     
==========================================
+ Hits         1527     2443     +916     
- Misses        215      653     +438     

see 7 files with indirect coverage changes

see 7 files with indirect coverage changes