Self hosted ServiceNow support

The idea is:

Allow specifying a full domain under ServiceNow credentials.

My use case:

We host our own ServiceNow, meaning it runs on its own domain.

I think it would be beneficial to add this because:

This would allow us to use the ServiceNow node!
We currently can’t use it since credentials can only receive a subdomain

Hey :slight_smile:
Would appreciate if anyone could take a look and approve the PR.

Thanks!