TEST: Coron3 fit update and unpin numpy

[braingram]

The same changes as #8717
and removing the numpy upper pin as the only remaining failure (seen in #8718) is with the coron tests (regression tests have not yet been run).

Resolves JP-nnnn

Closes #

This PR addresses ...

Tasks

• request a review from someone specific, to avoid making the maintainers review every PR
• add a build milestone, i.e. Build 11.3 (use the latest build if not sure)
• Does this PR change user-facing code / API?
  • add an entry to CHANGES.rst within the relevant release section (otherwise add the no-changelog-entry-needed label to this PR)
  • update or add relevant tests
  • update relevant docstrings and / or docs/ page
  • start a regression test and include a link to the running job (click here for instructions)
    • Do truth files need to be updated ("okified")?
      • after the reviewer has approved these changes, run okify_regtests to update the truth files
• if a JIRA ticket exists, make sure it is resolved properly

[braingram]

Test showed failures remain for numpy 2.x with changes in #8717

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.76%. Comparing base (9f82b52) to head (6fdaacb).
Report is 7 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8799      +/-   ##
==========================================
+ Coverage   60.75%   61.76%   +1.01%     
==========================================
  Files         375      377       +2     
  Lines       38367    38743     +376     
==========================================
+ Hits        23308    23929     +621     
+ Misses      15059    14814     -245     

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