Create member endpoint should return member details

[maxceem]

Endpoints GET /v5/projects/:projectId/members, GET /v5/projects/:projectId/members/:id, PATCH /v5/projects/:projectId/members/:id can return additional member details like 'photoURL', 'workingHourStart', 'workingHourEnd', 'timeZone', 'handle', 'email', 'firstName', 'lastName' if we explicitly list them in the fields query param. For example: https://api.topcoder-dev.com/v5/projects/17076/members/?fields=id%2CuserId%2Crole%2CisPrimary%2CdeletedAt%2CcreatedAt%2CupdatedAt%2CdeletedBy%2CcreatedBy%2CupdatedBy%2Chandle%2CphotoURL%2CworkingHourStart%2CworkingHourEnd%2CtimeZone%2Cemail

But the endpoint for creating new members POST /v5/projects/:projectId/members doesn't support returninig these additional fields. So if we want to get these additional details client-side, we would have to make 2 requests: create members and get member details.

We would like to update POST /v5/projects/:projectId/members to also support returning additional member details if they are explicitly listed in the fields query param.

Notes:

• we already have a reusable method to implement this util.getObjectsWithMemberDetails and we only have to properly apply it here
• if this method fails to get additional data, we still have to return a response without additional data
• this method returns 'email', 'firstName', 'lastName' only to admins, which should work the same for this endpoint (nothing to do here as it works automatically, just FYI)

Task:

• Update method to return members' details.
• Update Postman if needed.
• Verify that it works properly.

[maxceem]

This is done by #629 and merged to DEV.

FYI @RishiRajSahu. We would need this for TaaS API topcoder-platform/taas-apis#148