bpo-46712: Let generate_global_objects.py Run on Earlier Python Versions (gh-31637)

https://bugs.python.org/issue46712

Author: ericsnowcurrently

Makefile.pre.in

@@ -1176,7 +1176,7 @@ regen-importlib: regen-frozen
 # Global objects
 
 .PHONY: regen-global-objects
-regen-global-objects: $(srcdir)/Tools/scripts/generate_global_objects.py
+regen-global-objects: regen-deepfreeze $(srcdir)/Tools/scripts/generate_global_objects.py
 	$(PYTHON_FOR_REGEN) $(srcdir)/Tools/scripts/generate_global_objects.py
 
 ############################################################################

Tools/scripts/generate_global_objects.py

@@ -259,7 +259,7 @@ def generate_runtime_init(identifiers, strings):
         printer.write(after)
 
 
-def get_identifiers_and_strings() -> tuple[set[str], dict[str, str]]:
+def get_identifiers_and_strings() -> 'tuple[set[str], dict[str, str]]':
     identifiers = set(IDENTIFIERS)
     strings = dict(STRING_LITERALS)
     for name, string, *_ in iter_global_strings():