[VPlan] Support match unary and binary recipes in pattern matcher (NFC).

Generalize pattern matchers to take recipe types to match as template
arguments and use it to provide matchers for unary and binary recipes
with specific opcodes and a list of recipe types (VPWidenRecipe,
VPReplicateRecipe, VPWidenCastRecipe, VPInstruction)

The new matchers are used to simplify and generalize the code in
simplifyRecipes.