[Enhancement] Add mem_pool_use_ratio metric to be#67701

arin-mirza wants to merge 3 commits intoStarRocks:mainStarRocks/starrocks:mainfrom

arin-mirza:add-be-metric-mem-pool-usage-ratioarin-mirza/starrocks:add-be-metric-mem-pool-usage-ratioCopy head branch name to clipboard