[Sharing NG] Inviting multiple people does not work

[JammingBen]

Describe the bug

Inviting multiple people at the same time via the recipients prop does not work.

Steps to reproduce

1. Create a file
2. Share that file with 2 or more users (payload: {"roles":["b1e2218d-eef8-4d4c-b82d-0f1a1b48f3b5"],"recipients":[{"objectId":"f7fbf8c8-139b-4376-b307-cf0a8c2d0d9c","@libre.graph.recipient.type":"user"},{"objectId":"058bff95-6708-4fe5-91e4-9ea3d377588b","@libre.graph.recipient.type":"user"}]} ).

Expected behavior

The file should be shared with all the given users.

Actual behavior

The server throws an error Key: 'DriveItemInvite.Recipients' Error:Field validation for 'Recipients' failed on the 'len' tag.

[rhafer]

This is basically a duplicate of #7962. That ticket has a lengthy discussion about why we don't currenty support adding mulitple recipients at once.

The plan is to add it in the future though.