PRW2: validate requests contain at least one samples or histograms#7201

yeya24 merged 2 commits intocortexproject:mastercortexproject/cortex:masterfrom

SungJin1212:Add-validation-at-least-one-sample-or-histogramSungJin1212/cortex:Add-validation-at-least-one-sample-or-histogramCopy head branch name to clipboard