WebGPU: add memory aliasing for intermediate tensor buffers #4886

Job	Run time
test-qnn / test-backend-linux (qnn, operators) / linux-job	14m 48s
test-qnn / test-backend-linux (qnn, models) / linux-job	26m 53s
test-qnn / test-backend-macos	-1s
test-qnn / package-golden-artifacts	2m 19s
	43m 59s

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