Qualcomm AI Engine Direct - Update mix-precision analyzer unitest (#2… #2626

Job	Run time
test-webgpu / test-backend-linux (webgpu, operators) / linux-job	59m 41s
test-webgpu / test-backend-linux (webgpu, models) / linux-job	41m 16s
test-webgpu / test-backend-macos	0s
test-webgpu / package-golden-artifacts	1m 41s
	1h 42m 38s

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