Removed hardcoding of RPacket radius

[xansh]

📝 Description

Type: 🪲 bugfix | 🎢 infrastructure

Inside montecarlo_main_loop, the inner boundary radius was being enforced during r_packet creation. Instead, it should use the radius selected by PacketSource

🚦 Testing

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☑️ Checklist

• I requested two reviewers for this pull request
• I updated the documentation according to my changes
• I built the documentation by applying the build_docs label

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[codecov]

Codecov Report

Merging #2381 (7c17377) into master (5b36105) will not change coverage.
The diff coverage is n/a.

❗ Current head 7c17377 differs from pull request most recent head 817d650. Consider uploading reports for the commit 817d650 to get more accurate results

@@           Coverage Diff           @@
##           master    #2381   +/-   ##
=======================================
  Coverage   70.57%   70.57%           
=======================================
  Files         139      139           
  Lines       12875    12875           
=======================================
  Hits         9087     9087           
  Misses       3788     3788           

Files Changed	Coverage Δ
tardis/montecarlo/montecarlo_numba/base.py	32.53% <ø> (ø)

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