perf: overlap the deletion vector and footer reads in Delta scan preparation - #7180

perf: overlap the deletion vector and footer reads in Delta scan preparation#7180

dwsmith1983 wants to merge 11 commits into

apache:mainapache/datafusion-comet:mainfrom

dwsmith1983:perf/5657-dv-footer-overlapdwsmith1983/datafusion-comet:perf/5657-dv-footer-overlapCopy head branch name to clipboard