Added check to skip mass loss-block for dt limits when METISSE is active

[d-maclean]

Hello,

This request tries to address an issue I see in some COSMIC-METISSE systems. If the mass loss rate is very high (e.g. during LBV or Wolf Rayet-like winds on an 80 Msun MS star), the timestep limit becomes very small (~1d-16) and causes evolv2 to run out of iterations very quickly.

This change skips that code block if METISSE is active. I do not think this is necessarily an issue since the winds are "baked in" to the tracks, rather than being added on during the timestep. However, I would very much like to be double-checked on this!

Cheers.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.14%. Comparing base (8772c07) to head (e0aae6a).
⚠️ Report is 170 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop     #796       +/-   ##
============================================
- Coverage    86.91%   76.14%   -10.77%     
============================================
  Files           40       58       +18     
  Lines        25542    28169     +2627     
  Branches         0      985      +985     
============================================
- Hits         22198    21448      -750     
- Misses        3344     6416     +3072     
- Partials         0      305      +305     

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