Fix GlobalScriptsContainer scripts attribute reference

[InspectorCaracal]

Brief overview of PR changes/additions

There is no scripts attribute on the GlobalScriptsContainer class; the correct attribute is loaded_data, as is done in the base Container class. As a result, attempting to do GLOBAL_SCRIPTS.all() currently results in the following traceback:

  File "./evennia/evennia/utils/containers.py", line 247, in all
    return self.scripts.values()
           ^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'values'

Motivation for adding to Evennia

Bug fixing

Other info (issues closed, discussion etc)

Reported on Discord