[dualtor][active-active][test plan] Add testcases to active-active dualtor I/O test plan (#7614)

Approach
What is the motivation for this PR?
Add those missed scenarios as testcases to the active-active dualtor I/O test plan.

Signed-off-by: Longxiang Lyu [email protected]

How did you do it?

Author: lolyu