[GlobalISel] Add and use a m_GAddLike pattern matcher. NFC (#125435) This adds a Flags parameter to the BinaryOp_match, allowing it to detect different flags like Disjoint. A m_GDisjointOr is added to detect Or's with disjoint flags, and G_AddLike is then either a m_GADD or m_GDisjointOr. The rest is trying to allow matching `const MachineInstr&`, as opposed to non-const references.
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