Fix two regression tests by increasing n_error_buf

[marchdf]

Summary

This fixes the FPEs that are showing up in debug builds of inflow_godunov_amr and inflow_bds_amr by making "good grids". You can see the failures here: https://my.cdash.org/tests/195392812

Pull request type

Please check the type of change introduced:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

Checklist

The following is included:

• new unit-test(s)
• new regression test(s)
• documentation for new capability

This PR was tested by running:

• the unit tests
  • on GPU
  • on CPU
• the regression tests
  • on GPU
  • on CPU

Additional information

Comparison of the grids for inflow_godunov_amr. This PR (left), main (right)

You can see that there are only 2 cells on level 1 between level 0 and level 2.

[marchdf]

The following tests FAILED:
         78 - inflow_godunov_amr (Failed)
         79 - inflow_bds_amr (Failed)

which is expected, they need to be reblessed.