GraphQL Services Return Compilation Errors when the Package Imports with Alias

[DimuthuMadushan]

Description:
The following GraphQL service returns compilation errors.

import ballerina/graphql as gql;

service on new gql:Listener(9090) {
    resource function get greeting() returns string {
        return "Hello, World!";
    }
}

Output:

Compiling source
        hello.bal
ERROR [hello.bal:(2:1,2:14236)] undefined annotation 'ServiceConfig'
ERROR [hello.bal:(2:1,2:14236)] undefined module 'graphql'
error: compilation contains errors

[github-actions]

This issue is NOT closed with a proper Reason/ label. Make sure to add proper reason label before closing. Please add or leave a comment with the proper reason label now.

      - Reason/EngineeringMistake - The issue occurred due to a mistake made in the past.
      - Reason/Regression - The issue has introduced a regression.
      - Reason/MultipleComponentInteraction - Issue occured due to interactions in multiple components.
      - Reason/Complex - Issue occurred due to complex scenario.
      - Reason/Invalid - Issue is invalid.
      - Reason/Other - None of the above cases.