CI: prefer bf16 over fp16 (#7304)
these days fp16 is barely ever used, so we should be testing bf16
instead of fp16 where possible.
had to fix a bunch of tests to adapt to this change. a few bugs as well
on the way.
---------
Signed-off-by: Stas Bekman <stas.bekman@snowflake.com>
Co-authored-by: Olatunji Ruwase <tunji.ruwase@snowflake.com>
Co-authored-by: Stas Bekman <stas.bekman@snowflake.com>
