Fix NuGet cache failures with custom paths (#761)

The second strip("global-packages: ") call is intended to remove the characters in the set "global-packages: " from both ends of the string. This set includes each individual character: 'g', 'l', 'o', 'b', 'a', 'l', '-', 'p', 'a', 'c', 'k', 'a', 'g', 'e', 's', ':', and ' ' (space). It does not treat "global-packages: " as a single substring to remove.

edk2toolext/environment/extdeptypes/nuget_dependency.py

@@ -169,7 +169,7 @@ def _fetch_from_nuget_cache(self, package_name: str) -> bool:
                 # Seek to the beginning of the output buffer and capture the output.
                 return_buffer.seek(0)
                 return_string = return_buffer.read()
-                self.nuget_cache_path = return_string.strip().strip("global-packages: ")
+                self.nuget_cache_path = return_string.strip().replace("global-packages: ", "")
 
         if self.nuget_cache_path is None:
             logging.info("Nuget was unable to provide global packages cache location.")