Move VtsHalNeuralnetworksV1_2/3TargetTest to group presubmit-large

The test config takes longer than 15mins to run. Move it to a dedicated
group for running slow presubmit Test Mapping test.

Bug: 174654670
Test: none
Change-Id: I11574377ed28676475321c4c84feccf5b33f08c3