Start tracing at `JUMP_BACKWARD_NO_INTERRUPT`

[markshannon]

Feature or enhancement

Proposal:

We have just added the ability to start tracing at the beginning of functions.
That still leaves yield from and await loops to be run in the interpreter without jitting.
By starting tracing at JUMP_BACKWARD_NO_INTERRUPT we fill that gap.

Before we can do that, there are two problems we need to fix:

• Ensuring good specialization while making progress in jitted code #145047 and
• Improving trace quality by tracking "fitness" and "exit quality" #146073

Once those are fixed, this should give us good jit coverage without degrading the quality of the traces.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere