Adding support for TwoPointMeasurement filters.

[vitenti]

Description

This PR introduces a filter system for TwoPointMeasurements.
This is required to finish the transition for the new create_ready framework.

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist:

The following checklist will make sure that you are following the code style and
guidelines of the project as described in the
contributing page.

• I have run bash pre-commit-check and fixed any issues
• I have added tests that prove my fix is effective or that my feature works
• I have made corresponding changes to the documentation
• I have 100% test coverage for my changes (please check this after the CI system has verified the coverage)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.0%. Comparing base (da7bb3a) to head (5cc7802).
Report is 23 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##           master     #479    +/-   ##
========================================
  Coverage   100.0%   100.0%            
========================================
  Files          55       55            
  Lines        4202     4331   +129     
  Branches      448      468    +20     
========================================
+ Hits         4202     4331   +129     

Files with missing lines	Coverage Δ
firecrown/data_functions.py	100.0% <100.0%> (ø)
firecrown/generators/inferred_galaxy_zdist.py	100.0% <100.0%> (ø)
firecrown/likelihood/factories.py	100.0% <100.0%> (ø)
firecrown/metadata_functions.py	100.0% <100.0%> (ø)
firecrown/metadata_types.py	100.0% <ø> (ø)
firecrown/utils.py	100.0% <100.0%> (ø)
firecrown/version.py	100.0% <100.0%> (ø)

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