[ILM][Downsample] Error is not reset when downsample action unmounts from the previous phase

[Dosant]

The PR for downsampling action was merged, but there is this validation edge case:

You can enable Downsample action in hot, warm, and cold phases. You can configure downsampling intervals. The interval has validation where it depends on the interval in the previous phase:

• they must be greater than any previous interval and a multiple of that interval.
  • For example, on the warm phase, the user includes a 3-hour interval; if they choose to add a rollup action on the cold phase, the interval must be a multiple of 3h. It cannot be 5h, for example.
  • Another example: a user can have a rollup on the hot phase of 2d and then no rollup action on the warm phase, and then a rollup action on the cold phase, but it must be a multiple of 2d, for example, it cannot be 1d nor can it be 3d.

There is currently the following bug:

• Enable Downsample in hot phase and set the interval to 1 day
• Enable Downsample in warm phase and set the interval to 1 day (see the error)
• Disable Downsample in hot phase (through the custom rollover option)
• See that the error in warm didn't disappear. The user needs to change the field to trigger validation

See the video:

validation.bug.mov

[elasticmachine]

Pinging @elastic/kibana-app-services (Team:AppServicesUx)

[elasticmachine]

Pinging @elastic/platform-deployment-management (Team:Deployment Management)