Upgrade miniscript/bitcoin dependency

Upgrade:

- bitcoin to v0.31.0
- miniscript to v11.0.0

Note: The bitcoin upgrade includes improvements to the
`Transaction::weight()` function, it appears those guys did good, we
no longer need to add the 2 additional weight units "just in case".

crates/bitcoind_rpc/tests/test_emitter.rs

@@ -350,7 +350,7 @@ fn tx_can_become_unconfirmed_after_reorg() -> anyhow::Result<()> {
         .rpc_client()
         .get_new_address(None, None)?
         .assume_checked();
-    let spk_to_track = ScriptBuf::new_v0_p2wsh(&WScriptHash::all_zeros());
+    let spk_to_track = ScriptBuf::new_p2wsh(&WScriptHash::all_zeros());
     let addr_to_track = Address::from_script(&spk_to_track, bitcoin::Network::Regtest)?;
 
     // setup receiver