Add check for package conflicts and change auto approve workflow to use assignee

[gsheni]

• Add check for package conflicts with install workflow
• Change auto approve workflow to use assignee
• Change create pull request to specify assignee and reviewer

[codecov]

Codecov Report

Merging #1843 (e0cc8a9) into main (22052c0) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1843   +/-   ##
=======================================
  Coverage   98.79%   98.79%           
=======================================
  Files         142      142           
  Lines       15850    15850           
=======================================
  Hits        15659    15659           
  Misses        191      191           

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