Add CODEOWNERS file #12027

Job	Run time
python-dependencies	33s
validate-schemas	3m 3s
node-dependencies	18s
docker-push	2m 42s
lint	1m 51s
test-unit	10m 30s
test-functional (timeout_modal_expired)	5m 6s
test-functional (timeout_modal_extended)	5m 14s
test-functional (timeout_modal_extended_new_window)	5m 17s
test-functional (features)	7m 41s
test-functional (summaries)	6m 4s
test-functional (general)	6m 16s
test-functional (journeys)	7m 14s
test-functional (components)	4m 58s
test-functional (list_collector)	5m 30s
	1h 12m 17s

Provide feedback