[flash_ctrl] ADD V2S TESTS
[flash_ctrl] ADD V2S TESTS

Add label V2S for tests. Add new fetch test to V2. Remove obb error test.

Signed-off-by: Nikola Miladinovic <a10fbe9c8dedddf1bb7901cce09c2f247993e362@ensilica.com>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan