Lint mapping table

[m-philipps]

• core: Update Fields/Annotations to match the PEtab v2 docs
• add a lint check for the mapping table
• Change the logic in petab.v2.lint.get_valid_parameters_for_parameter_table: add mapping table petabEntityId regardless of whether the corresponding modelEntityId would be valid (was L937->L1036)
• add a test for mapping table linting

[m-philipps]

Not necessary since this is collected as a set and the condition_targets are removed further down.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 75.00000% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.28%. Comparing base (5a3b361) to head (ef86844).

Files with missing lines	Patch %	Lines
petab/v2/lint.py	73.68%	4 Missing and 6 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #480      +/-   ##
==========================================
- Coverage   75.29%   75.28%   -0.01%     
==========================================
  Files          62       62              
  Lines        6946     6976      +30     
  Branches     1229     1241      +12     
==========================================
+ Hits         5230     5252      +22     
- Misses       1245     1247       +2     
- Partials      471      477       +6     

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