PluginManager: Load plugins on Windows correctly

On Windows we ship compiled files
3 jobs for master in 4 minutes and 2 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #17643
run-appdata

00:00:06

passed #17642
run-tests

00:03:39

 
  Build
passed #17644
run-build

00:00:16