[I] requiredMultiValueSelection allows zero selection and leads to error during execution (streampipes)

[via GitHub]

flomickl opened a new issue, #1351:
URL: https://github.com/apache/streampipes/issues/1351

   ### Body
   
   I implemented a requiredMultiValueSelection in my declaireMethoth.
   
   It is working as expected but it allows, that no value is selected.
   
   ```
           .requiredMultiValueSelection(
               Labels.withId(VALIDATION_TYPE_KEY),
               Options.from(
                   ValidationType.IsEmpty.name(),
                   ValidationType.IsSimple.name()
               )
           )
   ```
   
   **What I expect.**
   Select one or two of these options
   It should check if at least one field is selected.
   
   **What happens.**
   I can finish the Pipeline and no value is selected.
   
   
![grafik](https://user-images.githubusercontent.com/16739072/221377356-d71ad42f-5fc5-4be2-9273-4add124846f0.png)
   
   Pipeline is valid
   
![grafik](https://user-images.githubusercontent.com/16739072/221377523-316c76ba-3499-40da-9b97-bfb193d8870f.png)
   
   But starts to fail of course
   
![grafik](https://user-images.githubusercontent.com/16739072/221377553-9d319a37-0746-4afa-acda-a57094ca3769.png)
   
   
   
   
   
   
   
   
   ### StreamPipes Committer
   
   I acknowledge that I am a maintainer/committer of the Apache StreamPipes 
project.


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