perf: improve async op santizer speed and accuracy

[lucacasonato]

This commit improves async op sanitizer speed by only delaying metrics
collection if there are op_sleep ops in the resource table. This
results in a speedup of around 30% for small CPU bound unit tests.

It performs this check and possible delay on every collection now,
fixing an issue with parent test leaks into steps. Fixes #20498

Before:

/m/a/P/g/d/deno ❯❯❯ deno test -A --unstable ./cli/tests/unit/abort_controller_test.ts
running 6 tests from ./cli/tests/unit/abort_controller_test.ts
basicAbortController ... ok (5ms)
signalCallsOnabort ... ok (4ms)
signalEventListener ... ok (3ms)
onlyAbortsOnce ... ok (4ms)
controllerHasProperToString ... ok (3ms)
abortReason ... ok (3ms)

ok | 6 passed | 0 failed (44ms)

After:

/m/a/P/g/d/deno ❯❯❯ ./target/release/deno test -A --unstable ./cli/tests/unit/abort_controller_test.ts
running 6 tests from ./cli/tests/unit/abort_controller_test.ts
basicAbortController ... ok (3ms)
signalCallsOnabort ... ok (2ms)
signalEventListener ... ok (1ms)
onlyAbortsOnce ... ok (1ms)
controllerHasProperToString ... ok (1ms)
abortReason ... ok (1ms)

ok | 6 passed | 0 failed (29ms)

[lucacasonato]

The test failures are legit - some are bad tests, but the worker related ones are real. Working on a fix.

[bartlomieju]

LGTM, no comments. Awesome improvement