viable/strict/1790639441: [OSDC] Remove map_ec2_to_arc.py (#198706)

发生了什么

With every workflow naming its pod, the mapper has nothing left to translate. Its other behaviours are gone too: the ROCm and XPU passthroughs return their input unchanged, and the H100 mt- forcing is now literal in the workflows. One behaviour does disappear with it. The script dropped config: "onnx" from every ARC matrix, so that job has not run since the ARC switch. The entry is removed outright here rather than…

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