Fix zipfile packaging after GH-98103 (GH-99797)

* Add zipfile and test_zipfile to list of packages. Fixes regression introduced in #98103.

* Restore support for py -m test.test_zipfile

Author: jaraco

Lib/test/test_zipfile/__main__.py

@@ -0,0 +1,7 @@
+import unittest
+
+from . import load_tests  # noqa: F401
+
+
+if __name__ == "__main__":
+    unittest.main()

Makefile.pre.in

@@ -1978,6 +1978,7 @@ LIBSUBDIRS=	asyncio \
 		wsgiref \
 		$(XMLLIBSUBDIRS) \
 		xmlrpc \
+		zipfile \
 		zoneinfo \
 		__phello__
 TESTSUBDIRS=	idlelib/idle_test \
@@ -2051,6 +2052,7 @@ TESTSUBDIRS=	idlelib/idle_test \
 		test/test_tools \
 		test/test_ttk \
 		test/test_warnings test/test_warnings/data \
+		test/test_zipfile \
 		test/test_zoneinfo test/test_zoneinfo/data \
 		test/test_unittest test/test_unittest/testmock \
 		test/tracedmodules \