Disable VGF tests (#18899) #2346

Job	Run time
test-qnn / test-backend-linux (qnn, models) / linux-job	26m 39s
test-qnn / test-backend-linux (qnn, operators) / linux-job	14m 10s
test-qnn / test-backend-macos	0s
test-qnn / package-golden-artifacts	2m 22s
	43m 11s

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