fix: handle dfg databus in SSA normalization (#6249)

# Description

## Problem

Resolves #6227

## Summary

## Additional Context

## Documentation

Check one:
- [x] No documentation needed.
- [ ] Documentation included in this PR.
- [ ] **[For Experimental Features]** Documentation to be submitted in a
separate PR.

# PR Checklist

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

compiler/noirc_evaluator/src/ssa/opt/normalize_value_ids.rs

@@ -115,6 +115,11 @@ impl Context {
             terminator.mutate_blocks(|old_block| self.new_ids.blocks[&old_block]);
             new_function.dfg.set_block_terminator(new_block_id, terminator);
         }
+
+        // Also map the values in the databus
+        let old_databus = &old_function.dfg.data_bus;
+        new_function.dfg.data_bus = old_databus
+            .map_values(|old_value| self.new_ids.map_value(new_function, old_function, old_value));
     }
 }