avoid adding ParticleNuclideFilter multiple times to tally in prepare_tallies

[shimwell]

Description

This Pr adds a check to ensure that the prepare_tallies function in d1s doesn't add a particle filter to a tally if the tally already has a particle filter.

I noticed this is a potential issue if the user is performing d1s studies with mixed dd and dt pulses, it is easy to overly prepare the tallies and get strange results as a consequence. I have accidentally "over prepared tallies" and it took a while to realize what was going wrong.

Fixes # (issue)

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)