N8N-3206 add xc token to nocodb

[Joffcom]

Adds a second credential type to NocoDB to support API Tokens as well as User Tokens that are used for the Swagger interface
Adds credential testing for both credential types
Fixes an issue when the Host contains a trailing /

Original work was done in #2909

[Joffcom]

Hey @valentina98,

We had this one on hold while we worked on merging another PR that has come in to update the API used, In the other PR what they have done is made it a bit more dynamic than what I had done based on your original PR.

const tokenType = (credentials.apiToken.toString().length > 40) ? 'xc-auth' : 'xc-token';

This would allow both options to work in the same credential without breaking anything and I think it might be easier for our users as they can just paste in either option and it will just work.

What do you think?

[Joffcom]

Closing as changes are merged into #3146