Front Copy dataset api of z/OSMF via data-sets APIs

[jordanCain]

Describe the solution you'd like
The z/OSMF Datasets API for copying a dataset should be fronted by the data-sets APIs
Copying datasets
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.4.0/com.ibm.zos.v2r4.izua700/IZUHPINFO_API_PutDataSetMemberUtilities.htm

Describe alternatives you've considered
Use z/OSMF. APIs directly

Additional context
Originally raised in zowe/api-layer#900

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Engineering team info (eg https://github.com/zowe/explorer-jes/issues/4)

As a [type of user],
I want [some goal]
so that [some reason].

Details/notes
[Detail - implementation notes]

Acceptance Criteria

*Scenario 1: [Title]
Given [context]
And [some more context]...
When [event]
Then [outcome]
 And [another outcome]...

[jordanCain]

@Destabilizator Can you inform on the priority of this? Could you tell us what it's blocking you from being able to do?

[Destabilizator]

I have to use z/OSMF API directly and follow their somewhat unintuitive syntax.
Ideally, I'd like API ML to front all z/OSMF endpoints and enhancing the syntax where appropriate.