Task Time Observers (https://cs.chromium.org/chromium/src/base/task/sequence_manager/task_time_observer.h?rcl=d9802ae7afb03c14542465f06ede7d99999fc49c&l=23) don't include the time spent in V8 Microtasks.

This means we miss time spent in microtasks when computing a variety of metrics, including EQT, and long tasks for the long task web perf API.