[Libomptarget] Do not abort on failed plugin init (#77623)

Summary:
The current code logic is supposed to skip plugins that aren't found or
could not be loaded. However, the plugic ontained a call to `abort` if
it failed, which prevented us from continuing if initilalization the
plugin failed (such as if `dlopen` failed for the dyanmic plugins).
GitOrigin-RevId: e203968e411bba6395133d93881eb32e7895e50b
1 file changed