[ML] Persist data counts and datafeed timing stats asynchronously#93000

Merged

droberts195 merged 3 commits intoelastic:mainfrom droberts195:faster_data_counts_datafeed_timing_stats_writing

Jan 23, 2023

+275-91

Commits on Jan 17, 2023

Commits on Jan 18, 2023

Use getCount() instead of await(1, NANOSECONDS)
droberts195
committed