[DAG] Fold (bitcast (logicop (bitcast x), (c))) -> (logicop x, (bitcast c))...

[DAG] Fold (bitcast (logicop (bitcast x), (c))) -> (logicop x, (bitcast c)) iff the current logicop type is illegal

Try to remove extra bitcasts around logicops if we're dealing with illegal types

Fixes the regressions in D145939

Differential Revision: https://reviews.llvm.org/D146032