Create solana-rpc crate and move subscriptions (#17320)

* Move non_circulating_supply to runtime

* Add solana-rpc crate and move max_slots

* Move subscriptions to solana-rpc

* Single use statements

rpc/src/lib.rs

@@ -0,0 +1,21 @@
+#![allow(clippy::integer_arithmetic)]
+pub mod max_slots;
+pub mod optimistically_confirmed_bank_tracker;
+pub mod parsed_token_accounts;
+pub mod rpc_completed_slots_service;
+pub mod rpc_pubsub;
+pub mod rpc_pubsub_service;
+pub mod rpc_subscriptions;
+
+#[macro_use]
+extern crate log;
+
+#[macro_use]
+extern crate serde_derive;
+
+#[cfg(test)]
+#[macro_use]
+extern crate serde_json;
+
+#[macro_use]
+extern crate solana_metrics;