Support dynamic indexAlias through dynamic index patterns in ism policy using DP

[kranthikirang]

Is your feature request related to a problem? Please describe.
Currently data-prepper is managing dynamic policy creation and template creation but not ISM policy. When user supplies the custom policy there is no way currently update the index-patterns. Use can't supply dynamic index patterns unless user manages policies manually which will remove the user of data-prepper.

Describe the solution you'd like
Using DP we shall create index pattern/update index-pattern when user supplies ISM policy based on indexAlias*. So, that even if there is another dynamic index is create this will take care of the policy, template and index (including rollover).