* ck-builder: remove SPATIAL_DIM parameter from ConvTensorLayouts
This information is already in the SIGNATURE, so its pointless to pass it
separately. This streamlines the interface of those functions a bit. Also
touches up the style of those files in general.
* ck-builder: implement reference conv using old ck
The old ck implementation is more featureful and better tested.
* ck-builder: replace test_reference_execution reference with old ck
This strips out the ck-tile gpu reference implementation completely.
* ck-builder: clean up test_reference_execution
- Remove unneccesary messages
- Replace EXPECT_TRUE(true) with EXPECT_NO_THROW()