Optimize transaction service queries

Transaction service sql db queries must handle
  `DieselError(DatabaseError(__Unknown, "database is locked"))`. This PR attempts
  to remove situations where that error may occur under highly busy async
  cirumstances, specifically:
- Combine find and update/write type queries into one.
- Add sql transactions around complex tasks.

base_layer/wallet/src/transaction_service/storage/database.rs

@@ -117,7 +117,7 @@ pub trait TransactionBackend: Send + Sync + Clone {
     /// Mark a pending transaction direct send attempt as a success
     fn mark_direct_send_success(&self, tx_id: TxId) -> Result<(), TransactionStorageError>;
     /// Cancel coinbase transactions at a specific block height
-    fn cancel_coinbase_transaction_at_block_height(&self, block_height: u64) -> Result<(), TransactionStorageError>;
+    fn cancel_coinbase_transactions_at_block_height(&self, block_height: u64) -> Result<(), TransactionStorageError>;
     /// Find coinbase transaction at a specific block height for a given amount
     fn find_coinbase_transaction_at_block_height(
         &self,
@@ -693,7 +693,7 @@ where T: TransactionBackend + 'static
         &self,
         block_height: u64,
     ) -> Result<(), TransactionStorageError> {
-        self.db.cancel_coinbase_transaction_at_block_height(block_height)
+        self.db.cancel_coinbase_transactions_at_block_height(block_height)
     }
 
     pub fn find_coinbase_transaction_at_block_height(