Replace command line parsing library for Cpp11

[galabovaa]

cxxopts upgrade introduced one line from C++17 causing warnings.
CLI11 is only C++11

[jajhall]

Fine with me

[codecov]

Codecov Report

Attention: Patch coverage is 47.22222% with 76 lines in your changes missing coverage. Please review.

Project coverage is 78.79%. Comparing base (17928bb) to head (fee8e64).
Report is 15 commits behind head on latest.

Files with missing lines	Patch %	Lines
app/HighsRuntimeOptions.h	51.81%	53 Missing ⚠️
app/RunHighs.cpp	32.35%	23 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           latest    #2211   +/-   ##
=======================================
  Coverage   78.78%   78.79%           
=======================================
  Files         343      343           
  Lines       83012    83001   -11     
=======================================
- Hits        65404    65400    -4     
+ Misses      17608    17601    -7     

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