feat(glue-alpha): add SNOWFLAKE connection type

- Add SNOWFLAKE enum value to ConnectionType
- Add README documentation for SNOWFLAKE connection
- Extend integration test with SNOWFLAKE connection
- Update snapshot files

Co-authored-by: CommandCodeBot <noreply@commandcode.ai>

Author: sanyamk23

packages/@aws-cdk/aws-glue-alpha/README.md

@@ -458,7 +458,16 @@ new glue.Connection(this, "RdsConnection", {
 });
 ```
 
-If you need to use a connection type that doesn't exist as a static member on `ConnectionType`, you can instantiate a `ConnectionType` object, e.g: `new glue.ConnectionType('NEW_TYPE')`.
+For Snowflake `Connection`, you can use the `SNOWFLAKE` connection type:
+
+```ts
+new glue.Connection(this, 'SnowflakeConnection', {
+  type: glue.ConnectionType.SNOWFLAKE,
+  connectionName: 'snowflake-connection',
+});
+```
+
+If you need to use a connection type that doesn't exist as a static member on `ConnectionType`, you can instantiate a `ConnectionType` object, e.g: `new glue.ConnectionType('NEW_TYPE')`.**
 
 See [Adding a Connection to Your Data Store](https://docs.aws.amazon.com/glue/latest/dg/populate-add-connection.html) and [Connection Structure](https://docs.aws.amazon.com/glue/latest/dg/aws-glue-api-catalog-connections.html#aws-glue-api-catalog-connections-Connection) documentation for more information on the supported data stores and their configurations.
 

packages/@aws-cdk/aws-glue-alpha/test/integ.connection.js.snapshot/aws-glue-connection.metadata.json

@@ -438,6 +438,18 @@
      }
     }
    }
+  },
+  "SnowflakeConnectionDC9F05AB": {
+   "Type": "AWS::Glue::Connection",
+   "Properties": {
+    "CatalogId": {
+     "Ref": "AWS::AccountId"
+    },
+    "ConnectionInput": {
+     "Name": "snowflake-connection",
+     "ConnectionType": "SNOWFLAKE"
+    }
+   }
   }
  },
  "Parameters": {

packages/@aws-cdk/aws-glue-alpha/test/integ.connection.js.snapshot/aws-glue-connection.template.json

@@ -18,3 +18,9 @@ new glue.Connection(stack, 'NetworkConnection', {
   subnet: vpc.privateSubnets[0],
   securityGroups: [sg],
 });
+
+// Snowflake connection
+new glue.Connection(stack, 'SnowflakeConnection', {
+  type: glue.ConnectionType.SNOWFLAKE,
+  connectionName: 'snowflake-connection',
+});