[keyserver] Don't use web version when sending desktop notifs

Summary:
For windows and macos we don't want to use the web's codeVersion when sending notifs. This diff keeps the previous behaviour of keeping the codeVersion as -1 in case of desktop notifs. Made a task for handling desktop versions on the keyserver: ENG-3917

Depends on D7855

Test Plan: Set web version, try sending a macOS notification. Check if the codeVersion in the notifications table is -1.

Reviewers: kamil, tomek

Reviewed By: tomek

Subscribers: ashoat, atul

Differential Revision: https://phab.comm.dev/D7903