optimization: zero-alloc / in-place PIPCost

[merlinio2000]

Removes ALL Allocations/Clones from the very often called PIPCost.logl

Operations are switched out for their in-place variations, pnu calculation even directly makes use of the blas cmpy operation.

Locally it seems like another 20-30% improvement.

[github-actions]

Test Results

354 tests   354 ✅  35m 7s ⏱️
  2 suites    0 💤
  1 files      0 ❌

Results for commit 04c7bab.

[codecov]

Codecov Report

❌ Patch coverage is 99.22780% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 96.46%. Comparing base (c9c73d6) to head (04c7bab).
⚠️ Report is 64 commits behind head on develop.

Files with missing lines	Patch %	Lines
phylo/src/pip_model/mod.rs	99.20%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #61      +/-   ##
===========================================
+ Coverage    96.26%   96.46%   +0.20%     
===========================================
  Files           27       30       +3     
  Lines         3991     4359     +368     
===========================================
+ Hits          3842     4205     +363     
- Misses         149      154       +5     

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