Avoid name in favor of id and title

[m-mohr]

In the specification it is defined that each process and collection has a name. This name is expected to be a unique identifier. I'd propose to change this to an id due to the following reasons:

• id and title are unambiguous, name is not. Throughout software industry name is used for both titles and identifiers. Just by changing name to id the documentation would be much clearer what is expected there.
• Consistency. name is used for processes and datasets, all other use id. As WFS/STAC will change to id, we should also apply this ton the processes. It would also make the conection to process_id in the process graph more clear.

Related issues: opengeospatial/ogcapi-features#171 + radiantearth/stac-spec#262

[m-mohr]

For consistency, we should align with data discovery and process discovery and replace "service_id", "process_graph_id", "job_id" etc in their entities responses with "id".

[m-mohr]

Implemented where unambiguous.