backport: merge bitcoin#28577, #28588, #28634, #28849, #28805, #28951, #29058, #29239, partial bitcoin#28331, #28452 (BIP324 backports: part 2)

backport: merge bitcoin#28577, #28588, #28634, #28849, #28805, #28951, #29058, #29239, partial bitcoin#28331, #28452 (BIP324 backports: part 2) #1071