[mlir][spirv] Add folding for Bitwise[Or|And|Xor] (#74193)

Add missing constant propogation folder for Bitwise[Or|And|Xor].

Move previous Bitwise[Or|And] fold implementations to
SPIRVCanonicalization for consistency.

Implement additional folding when lhs == rhs and rhs = 0 for Xor. As
well as, update an Xor testcase to account for this introduced folding.

This helps for readability of lowered code into SPIR-V.

Part of work for #70704