A common type for plugin configurations to support if ,else if ,else format

Is your feature request related to a problem? Please describe.
As a user of data prepper, I would like to be able to set different property values in the configuration depending on certain conditions.

Describe the solution you'd like
Similar to how the opensearch sink supports the actions parameter for conditionally choosing an action

actions:
  - when: "condition"
     type: "delete" 
  - when: "condition_two"
     type: "update"
  - type: "index" # default case

I would like to extract this out for common use with any parameter, without requiring duplicate code to evaluate the result. This could be by specifying this common type in the config like this.

In data-prepper-api

public SwitchWhen<T> {
    private List<T> configList; # contains 
    private List<String> whenConditions;

    private T getConfigForEvent(final Event event);
    
    
}

SomePluginConfig {
  
   @JsonProperty("actions")
   private SwitchWhen<ActionClass> actionsWhen;

}

public ActionClass {
    @JsonProperty("type")
    String type;
}

this would make it easy to add support for other parameters that need this same functionality, for example for s3 sink thresholds

public S3SinkConfig {
   
   @JsonProperty("thresholds")
   private SwitchWhen<ThresholdOptions> thresholdOptions; 

}

Describe alternatives you've considered (Optional)
Only support expressions to fit this use case, but this required add_entries processors with when conditions to some sort of metadata or part of the Event data and then using that in expression value. This is a more confusing user experience.

Additional context
Add any other context or screenshots about the feature request here.

Start by reading the existing opensearch sink actions configuration and the proposed data-prepper-api SwitchWhen shape, then compare how plugin configuration classes represent actions and the proposed S3 sink thresholds. Done means a common conditional configuration type can support when clauses and a default case for multiple plugin parameters without duplicating condition evaluation.