[CDRIVER-4448] Fix interaction of bson_visit with bson_validate#1090

vector-of-bool wants to merge 5 commits intomongodb:mastermongodb/mongo-c-driver:masterfrom

vector-of-bool:CDRIVER-4448-bson_validatevector-of-bool/mongo-c-driver:CDRIVER-4448-bson_validateCopy head branch name to clipboard