Implement subvolume quiesce API

[Madhu-1]

CephFS is adding new CLI options for Subvolume quiescing, we need to add the go-ceph implementation for the same. [1] is the PR link for ceph

[1] ceph/ceph#54485

[agarwal-mudit]

/assign @manishym

[phlogistonjohn]

Slash commands don't do anything in this repo, but if @manishym would like to help add this feature, that's be great. :-)
FWIW I recently joined ceph slack so if there needs to be any interactive "on boarding", help, or design discussion, that's a good place to do it.

[manishym]

@phlogistonjohn I am working on it. Can you please assign it to me.

[phlogistonjohn]

Your wish is my command 🪄