[X86][AArch64][WebAsm][RISCV] Query operand properties instead of using enums directly [nfc]

This is part of an ongoing transition to use OperandValueInfo which combines OperandValueKind and OperandValueProperties.  This change adds some accessor methods and uses them to simplify backend code.  The primary motivation of doing so is removing uses of the parameters so that an upcoming api change is less error prone.