[AMDGPU] Use glue for convergence tokens at call-like operations (#86766) The earlier implementation on AMDGPU used explicit token operands at SI_CALL and SI_CALL_ISEL. This is now replaced with CONVERGENCECTRL_GLUE operands, with the following effects: - The treatment of tokens at call-like operations is now consistent with the treatment at intrinsics. - Support for tail calls using implicit tokens at SI_TCRETURN "just works". - The extra parameter at call-like instructions is eliminated, thus restoring those instructions and their handling to the original state. The new glue node is placed after the existing glue node for the outgoing call parameters, which seems to not interfere with selection of the call-like nodes.
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