Delete connection from frontend (#4880)

This PR:
- creates the query to delete a connection
- creates the hook that triggers the query
- triggers the hook function when clicking on remove + get back to
connection page

---------

Co-authored-by: Thomas Trompette <thomast@twenty.com>

packages/twenty-front/src/modules/databases/graphql/mutations/deleteOneDatabaseConnection.ts

@@ -0,0 +1,9 @@
+import { gql } from '@apollo/client';
+
+export const DELETE_ONE_DATABASE_CONNECTION = gql`
+  mutation deleteServer($input: RemoteServerIdInput!) {
+    deleteOneRemoteServer(input: $input) {
+      id
+    }
+  }
+`;