add argument to disable run_at_connect in MapdlGrpc

[Gryfenfer97]

[ansys-reviewer-bot[bot]]

Thanks for opening a Pull Request. If you want to perform a review write a comment saying:

@ansys-reviewer-bot review

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.14%. Comparing base (42ef513) to head (14839b7). Report is 11 commits behind head on main.

:exclamation: Current head 14839b7 differs from pull request most recent head c958d9a. Consider uploading reports for the commit c958d9a to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3049      +/-   ##
==========================================
- Coverage   86.68%   84.14%   -2.54%     
==========================================
  Files          52       52              
  Lines        9498     9499       +1     
==========================================
- Hits         8233     7993     -240     
- Misses       1265     1506     +241