Add possibility to configure custom `dnsConfig` on the Nextcloud pod #1009

Job	Run time
changes	5s
lint	39s
run-tests (Default - no custom values)	1m 42s
run-tests (PostgreSQL Enabled, --helm-extra-set-args "--set=postgresql.enabled=true --set=postgre...	2m 22s
run-tests (Nginx Enabled, --helm-extra-set-args "--set=image.flavor=fpm --set=nginx.enabled=true")	1m 43s
run-tests (Horizontal Pod Autoscaling Enabled, --helm-extra-set-args "--set=hpa.enabled=true --se...	1m 42s
summary	4s
	8m 17s

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