fix: Bug located in VSEL using KSWP field

[kmkoshy]

Description

Please provide a brief description of the changes made in this pull request.
Fix for #3349

1. ksel, esel, nsel uses kabs (for field 7)
2. lsel, asel, vsel uses kswp (for field 7)

Wrappers on vsel and other related cmds - like @allow_pickable_entities use _get_args_xsel to get the args passed. This function currently accounts only for kabs , added logic for kswp.

Issue linked

Please mention the issue number or describe the problem this pull request addresses.
#3349

Checklist

• I have visited and read Develop PyMAPDL.
• I have tested my changes locally
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.33%. Comparing base (62b3786) to head (833827a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3753      +/-   ##
==========================================
+ Coverage   88.28%   88.33%   +0.04%     
==========================================
  Files         187      187              
  Lines       14704    14704              
==========================================
+ Hits        12982    12989       +7     
+ Misses       1722     1715       -7     

[germa89]

Great solution @kmkoshy! Thank you for fixing this!