interpreter: Fix dependency(..., modules: x) fallback

Where the subproject got registered without modules, but is later looked
up with modules specified.

We cannot do the filtering in get_dep_identifier(), as the list of
modules matters in case of external dependencies.

mesonbuild/interpreter/dependencyfallbacks.py

@@ -209,6 +209,10 @@ def _get_cached_dep(self, name: str, kwargs: TYPE_nkwargs) -> T.Optional[Depende
         wanted_vers = stringlistify(kwargs.get('version', []))
 
         override = self.build.dependency_overrides[for_machine].get(identifier)
+        if not override and self.subproject_name:
+            identifier_without_modules = tuple((k, v) for k, v in identifier if k not in {'modules', 'optional_modules'})
+            if identifier_without_modules != identifier:
+                override = self.build.dependency_overrides[for_machine].get(identifier_without_modules)
         if override:
             info = [mlog.blue('(overridden)' if override.explicit else '(cached)')]
             cached_dep = override.dep