add memory coalescing pass

better reports
refactor for more code-reuse and patter usage
fixes

backend-simulators/pim/pim-simulator/src/lib/json_to_instruction/json_to_executor.rs

@@ -15,9 +15,9 @@ use crate::{
 };
 
 
-pub fn json_to_executor<'a>(
+pub fn json_to_executor<'a, 'b>(
     config: Value,
-    mut cores: impl Iterator<Item = &'a Value>,
+    mut cores: impl Iterator<Item = &'b Value>,
     crossbars : Vec<Vec<&'a Crossbar>>
 ) -> Executable<'a> {
     let cell_precision = config.get("cell_precision").unwrap().as_i64().unwrap() as i32;