Fix egress-policy schema by removing pattern to match the one in ingress-policy schema. (#3533)

modules/vpc-sc/schemas/egress-policy.schema.json

@@ -34,8 +34,7 @@
         "identities": {
           "type": "array",
           "items": {
-            "type": "string",
-            "pattern": "^(?:serviceAccount:|user:|group:|principal:|\\$identity_sets:)"
+            "type": "string"
           }
         },
         "resources": {

modules/vpc-sc/schemas/egress-policy.schema.md

@@ -15,7 +15,6 @@
     <br>*enum: ['IDENTITY_TYPE_UNSPECIFIED', 'ANY_IDENTITY', 'ANY_USER_ACCOUNT', 'ANY_SERVICE_ACCOUNT', '']*
   - **identities**: *array*
     - items: *string*
-      <br>*pattern: ^(?:serviceAccount:|user:|group:|principal:|\$identity_sets:)*
   - **resources**: *array*
     - items: *string*
 - ⁺**to**: *object*