[XLA:GPU] Remove all_reduce_contiguous flag.
[XLA:GPU] Remove all_reduce_contiguous flag.

FUTURE_COPYBARA_INTEGRATE_REVIEW=https://github.com/openxla/xla/pull/13109 from jaro-sevcik:terminate-on-nccl-error 858aeacb2d689e4b03f4e3bcc0595223119143d5
