[Main to 25.6 hotfix] Speed up the loading of the entities by using set and also reduce complexity with supplied known hash set (#1316)#1320

benflexcompute merged 1 commit intorelease-candidate/25.6flexcompute/Flow360:release-candidate/25.6from

BenY/256Hotfix/SpeedUpEntityLoadingflexcompute/Flow360:BenY/256Hotfix/SpeedUpEntityLoadingCopy head branch name to clipboard