allow PkgEval to try to load JET always

[aviatesk]

PkgEval uses pre-release Julia builds, although JET currently rejects them.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.32%. Comparing base (cc2a151) to head (96f3cd4).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #690   +/-   ##
=======================================
  Coverage   90.32%   90.32%           
=======================================
  Files          15       15           
  Lines        3110     3110           
=======================================
  Hits         2809     2809           
  Misses        301      301           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.