internal/rosa/python: install packaging from source

This is required by many packages.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/python.go

@@ -322,6 +322,22 @@ func init() {
 	)
 }
 
+func init() {
+	const (
+		version  = "26.1"
+		checksum = "AOX4RBYPCMs2-vv8zSxQWANCK4XUbACRZWuR0ZHSiZ-fz_43IUXpMs_1-SZl8AVP"
+	)
+	artifactsM[PythonPackaging] = newPythonPackage(
+		"packaging", 60461,
+		"reusable core utilities for various Python Packaging interoperability specifications",
+		"https://packaging.pypa.io/",
+		version, newFromGitHub(
+			"pypa/packaging",
+			version, checksum,
+		), nil, nil, P{PythonFlitCore},
+	)
+}
+
 func init() {
 	const (
 		version  = "1.0.4"
@@ -366,13 +382,6 @@ func init() {
 		"qlyqX2YSXcV0Z8XgGaPttc_gkq-xsu_nYs6NFOcYnk-CX7qmcj45gG-h6DpwPIcO",
 	)
 
-	artifactsM[PythonPackaging] = newPypi(
-		"packaging", 60461,
-		"reusable core utilities for various Python Packaging interoperability specifications",
-		"26.1", "py3", "none", "any",
-		"6WZjBJeRb0eZZavxM8cLPcgD-ch-1FblsHoCFKC_9VUC5XAmd397LwliVhsnQcSN",
-	)
-
 	artifactsM[PythonIniConfig] = newPypi(
 		"iniconfig", 114778,
 		"a small and simple INI-file parser module",