anv: fix multiple creation with internal failure

anv: fix multiple creation with internal failure

The specification section 9.4 says :

   When an application attempts to create many pipelines in a single
   command, it is possible that some subset may fail creation. In that
   case, the corresponding entries in the pPipelines output array will
   be filled with VK_NULL_HANDLE values. If any pipeline fails
   creation (for example, due to out of memory errors), the
   vkCreate*Pipelines commands will return an error code. The
   implementation will attempt to create all pipelines, and only
   return VK_NULL_HANDLE values for those that actually failed.

Fixes :

   dEQP-VK.api.object_management.alloc_callback_fail_multiple.graphics_pipeline
   dEQP-VK.api.object_management.alloc_callback_fail_multiple.compute_pipeline

v2: C is hard let's go shopping (Lionel)

v3: Remove unnecessary condition in for loops (Lionel)

v4: Document why we return on first failure (Eduardo)
    Move i declaration inside for() (Eduardo)

v5: Move array cleanup out of loop (Jason)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>