Remove some uses of ptr_to_int and int_to_ptr, using ptr instead (#7297)

This is in preparation for the argument mutability analysis. This PR
also has some skeleton code for this analysis, but the actual analysis
is still a `todo!()`.

The analysis will also have better precision if we use fewer asm blocks,
but I'll get to that after working on the analysis itself.

forc/tests/cli_integration.rs

@@ -51,10 +51,10 @@ fn test_forc_test_raw_logs() -> Result<(), rexpect::error::Error> {
     // Assert that the output is correct
     process.exp_string("      test test_log_4")?;
     process.exp_string("raw logs:")?;
-    process.exp_string(r#"[{"LogData":{"data":"0000000000000004","digest":"8005f02d43fa06e7d0585fb64c961d57e318b27a145c857bcd3a6bdb413ff7fc","id":"0000000000000000000000000000000000000000000000000000000000000000","is":10368,"len":8,"pc":12460,"ptr":67107840,"ra":0,"rb":1515152261580153489}}]"#)?;
+    process.exp_string(r#"[{"LogData":{"data":"0000000000000004","digest":"8005f02d43fa06e7d0585fb64c961d57e318b27a145c857bcd3a6bdb413ff7fc","id":"0000000000000000000000000000000000000000000000000000000000000000","is":10368,"len":8,"pc":12456,"ptr":67107840,"ra":0,"rb":1515152261580153489}}]"#)?;
     process.exp_string("      test test_log_2")?;
     process.exp_string("raw logs:")?;
-    process.exp_string(r#"[{"LogData":{"data":"0000000000000002","digest":"cd04a4754498e06db5a13c5f371f1f04ff6d2470f24aa9bd886540e5dce77f70","id":"0000000000000000000000000000000000000000000000000000000000000000","is":10368,"len":8,"pc":12460,"ptr":67107840,"ra":0,"rb":1515152261580153489}}]"#)?;
+    process.exp_string(r#"[{"LogData":{"data":"0000000000000002","digest":"cd04a4754498e06db5a13c5f371f1f04ff6d2470f24aa9bd886540e5dce77f70","id":"0000000000000000000000000000000000000000000000000000000000000000","is":10368,"len":8,"pc":12456,"ptr":67107840,"ra":0,"rb":1515152261580153489}}]"#)?;
 
     process.process.exit()?;
     Ok(())
@@ -77,12 +77,12 @@ fn test_forc_test_both_logs() -> Result<(), rexpect::error::Error> {
     process.exp_string("decoded log values:")?;
     process.exp_string("4, log rb: 1515152261580153489")?;
     process.exp_string("raw logs:")?;
-    process.exp_string(r#"[{"LogData":{"data":"0000000000000004","digest":"8005f02d43fa06e7d0585fb64c961d57e318b27a145c857bcd3a6bdb413ff7fc","id":"0000000000000000000000000000000000000000000000000000000000000000","is":10368,"len":8,"pc":12460,"ptr":67107840,"ra":0,"rb":1515152261580153489}}]"#)?;
+    process.exp_string(r#"[{"LogData":{"data":"0000000000000004","digest":"8005f02d43fa06e7d0585fb64c961d57e318b27a145c857bcd3a6bdb413ff7fc","id":"0000000000000000000000000000000000000000000000000000000000000000","is":10368,"len":8,"pc":12456,"ptr":67107840,"ra":0,"rb":1515152261580153489}}]"#)?;
     process.exp_string("      test test_log_2")?;
     process.exp_string("decoded log values:")?;
     process.exp_string("2, log rb: 1515152261580153489")?;
     process.exp_string("raw logs:")?;
-    process.exp_string(r#"[{"LogData":{"data":"0000000000000002","digest":"cd04a4754498e06db5a13c5f371f1f04ff6d2470f24aa9bd886540e5dce77f70","id":"0000000000000000000000000000000000000000000000000000000000000000","is":10368,"len":8,"pc":12460,"ptr":67107840,"ra":0,"rb":1515152261580153489}}]"#)?;
+    process.exp_string(r#"[{"LogData":{"data":"0000000000000002","digest":"cd04a4754498e06db5a13c5f371f1f04ff6d2470f24aa9bd886540e5dce77f70","id":"0000000000000000000000000000000000000000000000000000000000000000","is":10368,"len":8,"pc":12456,"ptr":67107840,"ra":0,"rb":1515152261580153489}}]"#)?;
     process.process.exit()?;
     Ok(())
 }