TEP-0050: Ignore Task Failure Implementation

[QuanZhang-William]

In TEP-0050, we introduced a new API field OnError in PipelineTasks to configure PipelineTask failure strategy.

This issue tracks the implementation of the TEP.

• [TEP-0050] Convert Step OnError from string to "OnErrorType" type #5322
• [TEP-0050] Add OnError field #7162
• [TEP-0050] Implement PipelineTask OnError #7422
• [TEP-0050] Add Ignore Task Failure to alpha table #7468

/assign

[QuanZhang-William]

TEP-0050 is implemented

/close