Fix capturing SUNDIALS warnings after 7.1.1 upgrade

[dweindl]

Disable SUNDIALS's warning-handling through SUNLogger. Instead pipe everything both errors and warnings through the providedSUNErrHandlerFn.

For details, see #2550.

Fixes #2550.

This also corrects the error message formatting - file path and line numbers for debug builds, but omitted in release builds - which was inverted before.

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Previously (see red box): https://amici.readthedocs.io/en/develop/example_errors.html#Internal-t-=-[...]-and-h-=-[...]-are-such-that-t-+-h-=-t-on-the-next-step
Now: https://amici--2551.org.readthedocs.build/en/2551/example_errors.html#Internal-t-=-[...]-and-h-=-[...]-are-such-that-t-+-h-=-t-on-the-next-step

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.75%. Comparing base (c8778e5) to head (62ef501).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2551   +/-   ##
========================================
  Coverage    77.75%   77.75%           
========================================
  Files          325      325           
  Lines        21852    21852           
  Branches      1473     1473           
========================================
  Hits         16991    16991           
  Misses        4834     4834           
  Partials        27       27           

Flag	Coverage Δ
cpp	73.62% <ø> (ø)
cpp_python	34.20% <ø> (ø)
petab	37.06% <ø> (ø)
python	72.39% <ø> (ø)

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Files with missing lines	Coverage Δ
src/amici.cpp	79.16% <ø> (ø)
src/solver.cpp	78.49% <ø> (ø)
src/solver_cvodes.cpp	70.76% <ø> (ø)
src/solver_idas.cpp	38.59% <ø> (ø)