Add new configurable parameters for nuclear data processing

[janmalec]

Description

I have added an optional parameter to openmc.data.njoy.make_ace to specify the number of equi-probable angles. The default value in OpenMC is low, which helps reduce file size but significantly impacts benchmarking. This change ensures OpenMC is immediately useful for benchmarking new libraries.

Since the parameter is optional and defaults to 12, this modification should not introduce any breaking changes.

Fixes #3347

Checklist

• I have performed a self-review of my own code
• I have run clang-format (version 15) on any C++ source files (if applicable)
• I have followed the style guidelines for Python source files (if applicable)
• I have made corresponding changes to the documentation (if applicable)
• I have added tests that prove my fix is effective or that my feature works (if applicable)