feat: Improved data storage metrics (#10020)

This PR increases the level of telemetry around all of the node's data
stores. For every LMDB instance it reports the size of the specified
mapping, the actual DB size and the number of items. Additionally, for
the world state we report the number of leaves for every tree along with
the pending and proven chain heights.

---------

Co-authored-by: ludamad <[email protected]>

cpp/src/barretenberg/crypto/merkle_tree/lmdb_store/lmdb_tree_store.test.cpp

@@ -254,4 +254,4 @@ TEST_F(LMDBTreeStoreTest, can_write_and_read_leaves_by_hash)
         success = store.read_leaf_by_hash(VALUES[9], readBack, *transaction);
         EXPECT_FALSE(success);
     }
-}
+}