Remove svn dependency in default runs

[abhaasgoyal]

Fixes #230

Merge Message
When running benchcab, it checks out on svn branch, potentially for data files like GRID_DATA. This commit:

• Removes the dependency to check out in svn branch
• Cleans up internal variables for unused files
• Uses alternative sources for existing data files in svn - testing was done via bitwise comparison generated by main vs 230-remove-svn-dependency branch during integration tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e875575) 58.23% compared to head (d1d6280) 58.22%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #236      +/-   ##
==========================================
- Coverage   58.23%   58.22%   -0.01%     
==========================================
  Files          29       29              
  Lines        2114     2109       -5     
==========================================
- Hits         1231     1228       -3     
+ Misses        883      881       -2     

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[abhaasgoyal]

@ccarouge can you run benchcap for comparison on CABLE_AUX?

[ccarouge]

Comparison of benchcab with the gridinfo file from CABLE-AUX branch and with a gridinfo file in rp23 has been done. It has shown differences in the results. This is surprising and might require further investigation on the CABLE side later on.

To move on here, we will look at adding the CABLE-AUX data under /g/data/wd9 for the moment. This will change once we have a well-documented gridinfo file we can use instead.

[ccarouge]

There is one small change to make before merging. I'm approving because I don't think I need to review again after that change but feel free to ask anyway if you want to.

Once the change is done, you are free to merge (not squash or rebase please).