[X86] Fold TESTZ(OR(LO(X),HI(X)),OR(LO(Y),HI(Y))) -> TESTZ(X,Y)
Helps fix a number of poor codegen cases for allof(cmp()) with 256-bit vectors on AVX1
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8dd14e17
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Helps fix a number of poor codegen cases for allof(cmp()) with 256-bit vectors on AVX1