Add support for "config" to be a templated field in the EmrServerlessCreateApplicationOperator

[imonteroq]

Hi, I'd like that config in the EmrServerlessCreateApplicationOperator be a templated field so that I can use jinja templates in it. Would it be possible to incorporate it into the next release? I have tried overriding the operator and it's worked just fine:

class CustomEmrServerlessCreateApplicationOperator(EmrServerlessCreateApplicationOperator):
    template_fields: Sequence[str] = ("config",)

Thanks!