deploy: drop securityContext in podSpec for kong

Kong's docker image has been plagued with issues in the past:
- ran as `root` user, which was often flagged by users
- ran as user 1337, the magical PID used by Istio's proxy, this was for
  service mesh in kong, which has been removed in Kong 2.0.

The securityContext was added as a stopgap solution
to avoid such problems.

This is now being removed for two reasons:
- OpenShift cries out loud if runAsUser is set. It should be empty and
  OpenShift assigns a UID based on security settings in the platform.
  Removing this helps with a better user experience and optics.
- Majority of users are now running more recent versions of Kong which
  already have the fix

deploy/manifests/base/kong-ingress-dbless.yaml

@@ -25,8 +25,6 @@ spec:
       containers:
       - name: proxy
         image: kong:2.0
-        securityContext:
-          runAsUser: 1000
         env:
           # servers
         - name: KONG_PROXY_LISTEN

deploy/single/all-in-one-dbless-k4k8s-enterprise.yaml

@@ -706,8 +706,6 @@ spec:
           periodSeconds: 10
           successThreshold: 1
           timeoutSeconds: 1
-        securityContext:
-          runAsUser: 1000
       - env:
         - name: CONTROLLER_KONG_ADMIN_URL
           value: https://127.0.0.1:8444

deploy/single/all-in-one-dbless.yaml

@@ -701,8 +701,6 @@ spec:
           periodSeconds: 10
           successThreshold: 1
           timeoutSeconds: 1
-        securityContext:
-          runAsUser: 1000
       - env:
         - name: CONTROLLER_KONG_ADMIN_URL
           value: https://127.0.0.1:8444

deploy/single/all-in-one-postgres-enterprise.yaml

@@ -770,8 +770,6 @@ spec:
           periodSeconds: 10
           successThreshold: 1
           timeoutSeconds: 1
-        securityContext:
-          runAsUser: 1000
       - env:
         - name: CONTROLLER_KONG_ADMIN_TOKEN
           valueFrom:

deploy/single/all-in-one-postgres.yaml

@@ -719,8 +719,6 @@ spec:
           periodSeconds: 10
           successThreshold: 1
           timeoutSeconds: 1
-        securityContext:
-          runAsUser: 1000
       - env:
         - name: CONTROLLER_KONG_ADMIN_URL
           value: https://127.0.0.1:8444