Move to version 3 of registry, addressing SAP compliance concerns. (#664)

<!-- markdownlint-disable MD041 -->
#### What this PR does / why we need it
Address issue
[505](open-component-model/ocm-project#505)

#### Which issue(s) this PR fixes
open-component-model/ocm-project#505

---------

Signed-off-by: [email protected] <[email protected]>
Signed-off-by: Gergely Brautigam <[email protected]>
Co-authored-by: Gergely Brautigam <[email protected]>

Author: dee0sap

deploy/values.yaml

@@ -4,7 +4,7 @@ registry:
   image:
     repository: registry
     pullPolicy: IfNotPresent
-    tag: 2
+    tag: 3
     imagePullSecrets:
   address: registry.ocm-system.svc.cluster.local:5000
   tls:
@@ -14,8 +14,6 @@ registry:
         value: "/certs/cert.pem"
       - name: REGISTRY_HTTP_TLS_KEY
         value: "/certs/key.pem"
-      - name: REGISTRY_HTTP_TLS_CLIENTCAS_0
-        value: "/certs/ca.pem"
     volumeMounts:
       - mountPath: "/certs"
         name: "ocm-registry-tls-certs"