fix(cli): port-forward: update workspace last_used_at (#12659)

This PR updates the coder port-forward command to periodically inform coderd that the workspace is being used:

- Adds workspaceusage.Tracker which periodically batch-updates workspace LastUsedAt
- Adds coderd endpoint to signal workspace usage
- Updates coder port-forward to periodically hit this endpoint
- Modifies BatchUpdateWorkspacesLastUsedAt to avoid overwriting with stale data

Co-authored-by: Danny Kopping <danny@coder.com>

coderd/database/queries.sql.go

@@ -11504,6 +11504,9 @@ SET
 	last_used_at = $1
 WHERE
 	id = ANY($2 :: uuid[])
+AND
+  -- Do not overwrite with older data
+  last_used_at < $1
 `
 
 type BatchUpdateWorkspaceLastUsedAtParams struct {