Bug 2027114 - Produce expected data format in nimbus-cli list command

[freshstrangemusic]

The nimbus-cli list command expects the data from the RS server to be the raw JSON payload from the HTTP request, i.e., it should have a data field with the actual record contents. Until we have time to go through the entire SDK and CLI and update the parsing (see-also bug 2002310), we just wrap the returned response in an object with a data member.

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