support list data schema

[wintonzheng]

[!IMPORTANT] Update data_schema in TaskBlock and TaskBlockYAML to support list in addition to dict.

• Behavior:
  • Update data_schema in TaskBlock in block.py to support list in addition to dict.
  • Update data_schema in TaskBlockYAML in yaml.py to support list in addition to dict.

^{This description was created by for 628da39bfa549bcbfce8aec7cbb8027781668e29. It will automatically update as commits are pushed.}