opcode.opname does not contain specialised bytecodes

```
>>> import opcode
>>> opcode._specialized_opmap['BINARY_OP_ADD_INT']
151
>>> opcode.opname[151]
'<151>'
>>> 
```

Expected:

```
>>> opcode.opname[151]
'BINARY_OP_ADD_INT'
```


### Linked PRs
* gh-128892