What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind bug

What does this PR do / why do we need it:
Support NopNode as hccl operator input

Which issue(s) this PR fixes:

Fixes #I1HOBM:Support NopNode as hccl operator input

Special notes for your reviewers: