Fix 2166

[jajhall]

Although #2166 is not an issue, it highlighted that Gurobi reads MPS keywords in mixed case, so convert to upper case in HiGHS for comparisons

[codecov]

Codecov Report

Attention: Patch coverage is 96.96970% with 1 line in your changes missing coverage. Please review.

Project coverage is 78.69%. Comparing base (ed7323b) to head (e515dca).
Report is 3 commits behind head on latest.

Files with missing lines	Patch %	Lines
src/io/HMpsFF.cpp	96.55%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           latest    #2167      +/-   ##
==========================================
+ Coverage   78.68%   78.69%   +0.01%     
==========================================
  Files         345      345              
  Lines       83126    83135       +9     
==========================================
+ Hits        65408    65426      +18     
+ Misses      17718    17709       -9     

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