Introduce GraphQL Interceptor Configs

[DimuthuMadushan]

Description:
Part of #4199

To improve the GraphQL interceptor execution, it needs to introduce a new annotation for GraphQL interceptors. This annotation can be defined as follows:

public type InterceptorConfig record {|
    boolean global = true
|}

It can be used with GraphQL interceptor as follows:

@graphql:InterceptorConfig {
    global: true
}
readonly service class ServiceInterceptor {
    isolated remote function execute() returns anydata|error{
        //...
    }
}

The behavior of the global flag:

• if true: The interceptor will be applied to each and every field and subfield.
• if false: The interceptor will be applied to that particular type

Note: The flag applies only to the Service Interceptors

More details can be found here.