Snapshots: Align Remote Instances view to match new Snapshots right-drawer UX

[cstns]

Description

Parity with Hosted Instances snapshot UX: table row selection, right-drawer details, actions, and flow viewer, applied to Remote Instances.

Links: PR Design work

Which customers would this be available to

None

Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate