fix(pvtdatastorage): close collItr before releasing purgerLock in processCollElgEvents#5424

pfi79 merged 2 commits intohyperledger:mainhyperledger/fabric:mainfrom

sridhar-panigrahi:fix/pvtdata-collElg-purger-lock-iterator-racesridhar-panigrahi/fabric:fix/pvtdata-collElg-purger-lock-iterator-raceCopy head branch name to clipboard