Improve stats presentation for specialization
SEND and FOR_ITER use the same function to count the type of failure of specialization, which should require a minor improvement to make the correct specialization fail kind appear.
For example.
Before improvement:
| Failure kind | Count | Ratio |
|---|---|---|
| other | 27,540 | 96.6% |
| kind 13 | 980 | 3.4% |
After improvement:
| Failure kind | Count | Ratio |
|---|---|---|
| async generator send | 24,440 | 86.5% |
| other | 3,100 | 11.0% |
| list | 700 | 2.5% |