SlurmProcess: Add possibility to pass arbitrary options to sbatch via sbatch_options

[hejung]

Add the option to pass sbatch options to the SlurmProcess and makes use of the new sbatch_options argument to the SlurmProcess in:

• SlurmGmxEngine
• SlurmTrajectoryFunction

[codecov]

Codecov Report

Attention: Patch coverage is 73.43750% with 17 lines in your changes missing coverage. Please review.

Project coverage is 57.62%. Comparing base (fd81a88) to head (fdf0026).
Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
src/asyncmd/slurm.py	75.80%	15 Missing ⚠️
src/asyncmd/gromacs/mdengine.py	0.00%	1 Missing ⚠️
src/asyncmd/trajectory/functionwrapper.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #30      +/-   ##
==========================================
+ Coverage   57.24%   57.62%   +0.37%     
==========================================
  Files          18       18              
  Lines        2318     2362      +44     
  Branches      317      324       +7     
==========================================
+ Hits         1327     1361      +34     
- Misses        914      924      +10     
  Partials       77       77              

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