enhance the doc with examples and clear description about watsonx.data Manta endpoint

[aseelert]

Which topic are you reporting about?

Please enter a detailed description how to get the Manta URL endpoint. also based on which Region. and if this is only working for manta (IKC) instances in the same account only?

https://cloud.ibm.com/docs/watsonxdata?topic=watsonxdata-manta_integrate

What do you think needs to be updated?

Please enter a detailed description how to get the Manta URL endpoint.
"Enter the IBM Cloud host endpoint URL where the data lineage service is activated."

Anything else?

No response