feat: pull staging enterprise images directly from ECR

Point the staging enterprise service images at the ECR registry instead of
registry.mender.io, so the cluster pulls with the node role and drops the
me-proxy. The gui image (docker.io) is unchanged.

Ticket: MC-7956

Signed-off-by: Roberto Giovanardi <roberto.giovanardi@northern.tech>

Author: oldgiova

mender/values-staging.yaml

@@ -1,67 +1,67 @@
 auditlogs:
   image:
     tag: main@sha256:f30f4bf97a6eed7c5e418bbd58a062b379257eda8dd472d0f2d219c44dd89c57
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 deployments:
   image:
     tag: main@sha256:def82baf8d8fb178a94da7d3cec0f5b1e674ac101e2622c7323aa6b4c4c76700
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 inventory:
   image:
     tag: main@sha256:712a25714e0f6a0a61e7a5014ac197b325744df1d2555245fed151b7ac5e6e8c
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 create_artifact_worker:
   image:
     tag: main@sha256:3c5f38961d9b60a063a218346b266250b63e67de4ac65f611490a93330c9e40a
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 generate_delta_worker:
   image:
     tag: main@sha256:f142ff6d0945046e45acfcfb2bad76b31c7925eb1bd3368ff8a04f1da4f3e21a
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 deviceconnect:
   image:
     tag: main@sha256:3b3914ae971af3a81dfeda346bb3de4caf81ade4fec8644578e94e1d88ab7f86
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 device_auth:
   image:
     tag: main@sha256:68bfb945bf5f14d84267e8d3fbc8438a34fd465f12520aaee64f1fa1bd79d4ef
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 tenantadm:
   image:
     tag: main@sha256:2cae9c1467e88b1dba24ac109da68aea4e36148bd0be808f9710cbd4f6be792e
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 devicemonitor:
   image:
     tag: main@sha256:ace8f2ebec39afdc11e9c137ad1cc9542c5009925e72d9b7953146ac0f4cdd46
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 useradm:
   image:
     tag: main@sha256:32b35a057a82d2de1862401826b5c954a636fd6dc8ed455a4fdd83a410e319d8
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 deviceconfig:
   image:
     tag: main@sha256:30aa0a6d57987bf42f8f767f20ed9c910bcc1f77637352ec877e38d0fc74d3e1
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 iot_manager:
   image:
     tag: main@sha256:08d0f81d57adfe181a0b178bf929c9c845117387457700d565055bf71229b7ae
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 workflows:
   image:
     tag: main@sha256:071dcee89ed50c578c59a46d642ee176328e679592feaa9bb6dd7fcfb4c02193
-    registry: registry.mender.io
+    registry: 175683096866.dkr.ecr.us-east-1.amazonaws.com
     repository: mender-server-enterprise
 gui:
   image: