Cherry-pick MiGraphX EP fixes from upstream for rel-1.23.0#25659

nieubank merged 4 commits intomicrosoft:rel-1.23.0microsoft/onnxruntime:rel-1.23.0from

psakhamoori:rel-123-with-migraphx-fixpsakhamoori/onnxruntime:rel-123-with-migraphx-fixCopy head branch name to clipboard