GHA: Run workflows on pushes to release* branches

[dweindl]

Run workflows on pushes to release* branches.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.66%. Comparing base (7d57ed7) to head (f56a181).
⚠️ Report is 86 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3013      +/-   ##
==========================================
- Coverage   76.74%   76.66%   -0.09%     
==========================================
  Files         309      309              
  Lines       19901    19901              
  Branches     1498     1497       -1     
==========================================
- Hits        15273    15257      -16     
- Misses       4615     4631      +16     
  Partials       13       13              

Flag	Coverage Δ
cpp	72.44% <ø> (-0.09%)	⬇️
cpp_python	37.90% <ø> (ø)
petab	38.53% <ø> (ø)
petab_sciml	14.15% <ø> (ø)
python	69.27% <ø> (-0.09%)	⬇️
sbmlsuite-jax	32.98% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.
see 3 files with indirect coverage changes

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