internal/rosa/python: install pytest from source

Used by many python packages.

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

internal/rosa/python.go

@@ -449,17 +449,30 @@ func init() {
 }
 
 func init() {
-	artifactsM[PythonPyTest] = newPypi(
+	const (
+		version  = "9.0.3"
+		checksum = "qfLL_znWhbJCDbNJvrx9H3-orJ86z4ifhaW0bIn21jl2sDP-FVoX_1yieOypArQe"
+	)
+	artifactsM[PythonPyTest] = newPythonPackage(
 		"pytest", 3765,
 		"the pytest framework",
-		"9.0.3", "py3", "none", "any",
-		"57WLrIVOfyoRDjt5qD6LGOaDcDCtzQnKDSTUb7GzHyJDtry_nGHHs4-0tW0tiIJr",
+		"https://pytest.org",
+		version, newFromGitHub(
+			"pytest-dev/pytest",
+			version, checksum,
+		), &PackageAttr{
+			Env: []string{
+				"SETUPTOOLS_SCM_PRETEND_VERSION_FOR_PYTEST=" + version,
+			},
+		}, nil, P{PythonSetuptoolsSCM},
 		PythonIniConfig,
 		PythonPackaging,
 		PythonPluggy,
 		PythonPygments,
 	)
+}
 
+func init() {
 	artifactsM[PythonMarkupSafe] = newPypi(
 		"markupsafe", 3918,
 		"implements a text object that escapes characters so it is safe to use in HTML and XML",