Fix unittest failures #6954

Job	Run time
test-qnn / test-backend-linux (qnn, models) / linux-job	27m 55s
test-qnn / test-backend-linux (qnn, operators) / linux-job	14m 57s
test-qnn / test-backend-macos	0s
test-qnn / package-golden-artifacts	2m 22s
	45m 14s

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