fix: added logic to get data from PDS and update Demographic table#1857

HarmeetRandhawa-NHS merged 4 commits intomainNHSDigital/dtos-cohort-manager:mainfrom

DTOSS-12041-update-block-API-to-handle-participants-not-Demographics-tableNHSDigital/dtos-cohort-manager:DTOSS-12041-update-block-API-to-handle-participants-not-Demographics-tableCopy head branch name to clipboard