fix: Update AWS DynamoDB permission list and correct issues in DynamoDB examples (#2963)

fix: Update AWS DynamoDB permission list, and correct issues in DynamoDB examples

Note DeleteTable is only used for the zot tests, should not be needed in production

Signed-off-by: Andrei Aaron <aaaron@luxoft.com>

examples/README.md

@@ -873,10 +873,13 @@ Additionally if search extension is enabled, additional parameters are needed:
             "endpoint": "http://localhost:4566",
             "region": "us-east-2",
             "cacheTablename": "ZotBlobTable",
-            // used by search extensions
-            "repoMetaTablename": "ZotRepoMetadataTable",
-            "manifestDataTablename": "ZotManifestDataTable",
+            // used for auth
             "userDataTablename": "ZotUserDataTable",
+            "apiKeyTablename": "ZotApiKeyDataTable",
+            // used by search extension
+            "repoMetaTablename": "ZotRepoMetadataTable",
+            "imageMetaTablename": "ZotImageMetaTable",
+            "repoBlobsInfoTablename": "ZotRepoBlobsInfoTable",
             "versionTablename": "ZotVersion"
         }
 ```
@@ -891,6 +894,10 @@ The following AWS policy is required by zot for caching blobs. Make sure to repl
       "Effect": "Allow",
       "Action": [
         "dynamodb:CreateTable",
+        "dynamodb:DescribeTable",
+        "dynamodb:DeleteTable",
+        "dynamodb:Scan",
+        "dynamodb:BatchGetItem",
         "dynamodb:GetItem",
         "dynamodb:UpdateItem",
         "dynamodb:DeleteItem"
@@ -900,6 +907,8 @@ The following AWS policy is required by zot for caching blobs. Make sure to repl
   ]
 }
 
+Note `dynamodb:DeleteTable` is used only in running the zot tests, should not be needed in production.
+
 ### Redis
 
 Redis is an alternative to BoltDB (which cannot be shared by multiple zot instances) and DynamoDB (requires access to AWS).