Dataset Service API- Missing requests to check, enable and disable Dataset for Profile and Upsert

### Actual Behaviour
The current collection only deals with DULE for Datasets and not the basic operations related to datasets themselves as listed below.

### Expected Behaviour
Dataset Service API collection should have the POST , GET and PATCH requests to list, create dataset, check and enable/disable the dataset for Profile (and upsert).

#### Recommendation
Within Dataset Service API there should be two folders- 'Datasets' , and 'DULE' [just like Schema Registry API has sub folders]


I have created and tested the requests above which should be part of basic 'Datasets' folder and request you to incorporate them into the official collection for this API and move the existing ones to the DULE subfolder.
[[proposed] Dataset Service API.postman_collection.zip](https://github.com/adobe/experience-platform-postman-samples/files/9524100/proposed.Dataset.Service.API.postman_collection.zip)

Start by inspecting the existing Dataset Service API collection and comparing it with the attached proposed Dataset Service API.postman_collection.zip. Verify the proposed POST, GET, and PATCH requests for dataset listing, creation, and Profile/upsert enablement, then confirm that the collection has separate Datasets and DULE folders with the existing requests moved appropriately.

Written by the indexing model from the issue text.