GHA: Fix codecov warning

[dweindl]

Fixes

Unexpected input(s) 'file', valid inputs are ['base_sha', 'binary', 'codecov_yml_path', 'commit_parent', 'directory', 'disable_file_fixes', 'disable_search', 'disable_safe_directory', 'disable_telem', 'dry_run', 'env_vars', 'exclude', 'fail_ci_if_error', 'files', 'flags', 'force', 'git_service', 'gcov_args', 'gcov_executable', 'gcov_ignore', 'gcov_include', 'handle_no_reports_found', 'job_code', 'name', 'network_filter', 'network_prefix', 'os', 'override_branch', 'override_build', 'override_build_url', 'override_commit', 'override_pr', 'plugins', 'recurse_submodules', 'report_code', 'report_type', 'root_dir', 'run_command', 'skip_validation', 'slug', 'swift_project', 'token', 'url', 'use_legacy_upload_endpoint', 'use_oidc', 'use_pypi', 'verbose', 'version', 'working-directory']

Also set a distinct workflow name. There were two "PEtab" workflows - make them distinguishable.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.10%. Comparing base (c4a395b) to head (5337de2).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3074      +/-   ##
==========================================
- Coverage   77.74%   77.10%   -0.64%     
==========================================
  Files         313      313              
  Lines       20661    20661              
  Branches     1499     1499              
==========================================
- Hits        16062    15930     -132     
- Misses       4590     4722     +132     
  Partials        9        9              

Flag	Coverage Δ
cpp	71.19% <ø> (ø)
cpp_python	37.25% <ø> (ø)
petab	45.87% <ø> (ø)
petab_sciml	13.83% <ø> (ø)
python	69.84% <ø> (ø)
sbmlsuite-jax	?

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see 5 files with indirect coverage changes

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