[proxy] replace TimedLru with moka (#12726)

LKB-2536 TimedLru is hard to maintain. Let's use moka instead. Stacked
on top of #12710.

proxy/src/cache/mod.rs

@@ -1,6 +1,5 @@
 pub(crate) mod common;
+pub(crate) mod node_info;
 pub(crate) mod project_info;
-mod timed_lru;
 
-pub(crate) use common::{Cache, Cached};
-pub(crate) use timed_lru::TimedLru;
+pub(crate) use common::{Cached, ControlPlaneResult, CplaneExpiry};