[Improvement][Flink] Change Flink command into FLINK_HOME

[pegasas]

Search before asking

• [X] I had searched in the issues and found no similar feature requirement.

Description

configure flink into ${FLINK_HOME}/bin/flink to make ds env configration work.

Are you willing to submit a PR?

• [X] Yes I am willing to submit a PR!

Code of Conduct

• [X] I agree to follow this project's Code of Conduct