Draft: Fail OWNERS PR from partners

[mgoerens]

In case of an OWNERS PR submitted by a partner, the error message is different than in the case of a community/redhat OWNERS PR.

This copies the existing behavior that can be found here:

development/scripts/src/checkprcontent/checkpr.py

Lines 172 to 189 in 3ac6de4

	if "OWNERS" in none_chart_files:
	file_path = none_chart_files["OWNERS"]
	path_parts = file_path.split("/")
	category = path_parts[1] # Second after charts
	if category == "partners":
	msg = "[ERROR] OWNERS file should never be set directly by partners. See certification docs."
	print(msg)
	gitutils.add_output("owners-error-message", msg)
	elif (
	matches_found > 0
	): # There is a mix of chart and non-chart files including OWNERS
	msg = "[ERROR] Send OWNERS file by itself in a separate PR."
	print(msg)
	gitutils.add_output("owners-error-message", msg)
	elif len(files) == 1: # OWNERS file is the only file in PR
	msg = "[INFO] OWNERS file changes require manual review by maintainers."
	print(msg)
	gitutils.add_output("owners-error-message", msg)