PowhegControl: add 21.6 MRs which failed the sweep
contains changes submitted to 21.6 in the following MRs: !49113 (merged) !48639 (merged) !48572 (merged) !48096 (merged) !47164 (merged) !46579 (merged) !45492 (merged)
contains changes submitted to 21.6 in the following MRs: !49113 (merged) !48639 (merged) !48572 (merged) !48096 (merged) !47164 (merged) !46579 (merged) !45492 (merged)