`pyrefly report`: FQNs for `-stubs` packages should not include "-stubs"

[jorenham]

For example for scipy-stubs every FQN starts with scipy-stubs.*, instead of scipy.*:

{
  "kind": "function",
  "name": "scipy-stubs.stats._crosstab.CrosstabResult.__new__",

Pyrefly 0.60.1