i703: fixes for pybamm v25.4

[BradyPlanden]

Description

This PR completes the following:

• bugfix fitting_problem output for calc_grad under fail conditions
• adds fixed numpy random seed for pytest framework
• updates to IDAKLU where beneficial
• updates the CI matrix to remove macos-13 examples + integration.
• removes duplicated macos-14 integration tests from CI

Issue reference

Fixes #703

Review

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.22%. Comparing base (0a55c30) to head (5f13c46).
Report is 17 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #705   +/-   ##
========================================
  Coverage    99.22%   99.22%           
========================================
  Files           68       68           
  Lines         4922     4925    +3     
========================================
+ Hits          4884     4887    +3     
  Misses          38       38           

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[agriyakhetarpal]

Thanks, @BradyPlanden! This looks good to me, with two comments.

[agriyakhetarpal]

We probably won't need to set the solver to IDAKLU explicitly once pybamm-team/PyBaMM#4915 makes it to a release.

[NicolaCourtier]

Just one comment, thanks @BradyPlanden !