Add etabs to build

[JR-Morgan]

To merge after https://github.com/specklesystems/connector-installers/pull/40

[linear]

CNX-1116 Etabs Installer

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 17.35%. Comparing base (f4765b9) to head (0f3ce6b).
Report is 1 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #525   +/-   ##
=======================================
  Coverage   17.35%   17.35%           
=======================================
  Files         239      239           
  Lines        4805     4805           
  Branches      579      579           
=======================================
  Hits          834      834           
  Misses       3941     3941           
  Partials       30       30           

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