Warmup counters should be reset when JIT compiling code

[brandtbucher]

When we tier up into the JIT, we don't reset the warmup counter to a non-zero value. This means that after JIT code is invalidated (either because of watchers or because it's cold), we'll re-JIT that code the very next time it's hit. That's not ideal.

Linked PRs

• GH-126892: Reset warmup counters when JIT compiling code #126893