chore: create standalone gha for updating ontology mappings powering dp fe filters

[nayib-jose-gloria]

Reason for Change

• Part of https://app.zenhub.com/workspaces/single-cell-5e2a191dad828d52cc78b028/issues/gh/chanzuckerberg/single-cell/616

Changes

• Extracted update ontology mappings job into its own standalone GHA that can be triggered manually, so it can be run outside of migration in case the scripts need to be updated + run + deployed outside a migration cycle

Testing

• Ran a test from this branch, the GHA ran as expected and kicked off a PR in the data-portal repo with the changes as expected.

Notes for Reviewer

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2a6e60e) 84.12% compared to head (cd8283a) 84.17%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #705      +/-   ##
==========================================
+ Coverage   84.12%   84.17%   +0.05%     
==========================================
  Files          19       19              
  Lines        1871     1871              
==========================================
+ Hits         1574     1575       +1     
+ Misses        297      296       -1     

Flag	Coverage Δ
unittests	84.17% <ø> (+0.05%)	⬆️

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