Use hashlink over lru for LruCache (#8911)

Use the `LruCache` implementation provided by `hashlink` instead of the current `lru` one.
This is mostly a 1-to-1 swap with only slight API incompatibilities.
I have decided to leave some config files which previously used `NonZeroUsize` but they may not be required anymore and could potentially switch to `usize`.


Co-Authored-By: Mac L <mjladson@pm.me>

deny.toml

@@ -21,6 +21,7 @@ deny = [
     { crate = "scrypt", deny-multiple-versions = true, reason = "takes a long time to compile" },
     { crate = "syn", deny-multiple-versions = true, reason = "takes a long time to compile" },
     { crate = "uuid", deny-multiple-versions = true, reason = "dependency hygiene" },
+    { crate = "lru", deny-multiple-versions = true, reason = "use hashlink instead" },
 ]
 
 [sources]