[XLA:Runtime] Moved the nccl_api target to runtime folder.
[XLA:Runtime] Moved the nccl_api target to runtime folder.

This is part of an effort to move runtime targets to the runtime folder. #5758

FUTURE_COPYBARA_INTEGRATE_REVIEW=https://github.com/openxla/xla/pull/11122 from ROCm:5.7-rccl-hang 2d196b645ccac046309d44f747d42777f00f1c9b
