Wifi: Fix VTS tests broken due to uprev to Vendor HAL 1.6

This commit skips the tests for the deprecated HAL APIs due to the
addition of the Vendor HAL ver. 1.6

Bug: 220201314
Test: atest VtsHalWifiRttV1_4TargetTest
Test: atest VtsHalWifiV1_5TargetTest
Change-Id: I9c15249effa9a678115bf644012c0047ad13c66b