Configure dependabot on the release-0.19 branch #1000

Job	Run time
Clean up generated files	59s
Images	1m 50s
Clean up clusters	1m 27s
Clusters	1m 21s
Compilation	45s
Build multi-arch images	3m 25s
Deployment (operator)	2m 39s
Multiple gateways support	1m 21s
Deployment (helm)	2m 36s
Post mortem	1m 57s
E2E	3m 7s
Deployment (globalnet, operator)	3m 22s
Unit tests	1m 34s
Deployment (globalnet, helm)	2m 39s
Deployment (air-gap)	3m 6s
Deployment (air-gap, globalnet)	2m 55s
Deployment (air-gap, lighthouse)	3m 19s
Deployment (air-gap, ovn)	6m 41s
Deployment (dual-stack)	2m 32s
Deployment (ovn)	5m 43s
Deployment (ovn-ic)	6m 23s
Deployment (operator, lighthouse)	2m 25s
Deployment (helm, lighthouse)	2m 19s
Deployment (load-balancer)	2m 56s
Deployment (prometheus)	3m 7s
Deployment (operator, lighthouse clusterset-ip)	2m 34s
	1h 13m 2s

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