Revert "iorap-functional-test: Add iorap-functional-test to presubmit."

This reverts commit e4533f0e.

Reason for revert: The tests are very flaky. It prevents the new CLs. It's not flaky when using acloud. Temporarily turn it off before submitting ag/11056503

Bug: 155424393
Change-Id: I5d5ecc3162d6a89a1e86e3dfab91a4af05d9d2d1