Add `metrics.securityContext` and `metrics.podSecurityContext` #1064

Job	Run time
changes	6s
lint	35s
run-tests (Default - no custom values)	1m 39s
run-tests (PostgreSQL Enabled, --helm-extra-set-args "--set=postgresql.enabled=true --set=postgre...	2m 11s
run-tests (Nginx Enabled, --helm-extra-set-args "--set=image.flavor=fpm --set=nginx.enabled=true")	1m 44s
run-tests (Horizontal Pod Autoscaling Enabled, --helm-extra-set-args "--set=hpa.enabled=true --se...	1m 50s
summary	6s
	8m 11s

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