Add structured stats reporting and GPU memory tracking to Qwen3.5 MoE runner #3820

Job	Run time
test-arm / test-backend-linux (arm_vgf_fp, models) / linux-job	32m 1s
test-arm / test-backend-linux (arm_tosa_fp, models) / linux-job	29m 49s
test-arm / test-backend-linux (arm_tosa_fp, operators) / linux-job	19m 37s
test-arm / test-backend-linux (arm_vgf_fp, operators) / linux-job	16m 46s
test-arm / test-backend-macos	-1s
test-arm / package-golden-artifacts	49s
	1h 39m 1s

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