Add possibility to use dynamically loaded assemblies

[truthz03]

Because I need a way to load assemblies dynamically (plugins) in my project, I found some problems while serializing/deserializing payloads.
In order to solve this problem, I would like to implement a mechanism to resolve the necessary types manually if needed.

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This change is 

[truthz03]

@dotnet-policy-service agree

[cvijayak]

@truthz03

Please confirm whether the commit "367f574" will resolve the bug "#5356"

[truthz03]

@cvijayak
No, my commit will not fix this bug. My commit gives the possibility to deserialize stored things into unknown objects.
This means, if I add some activities and there payloads as plugin (within a different AppDomain), it will be possible to deserialize the json content to a type only known by the plugin AppDomain.

The bug #5356 shows problems with the serialization. It throws an error because the type is System.Type, which is a known type. I also don't know why System.Type is not serializeable.

[truthz03]

Is there something to do for my to get the "SonarCloud Code Analysis" ready?
Or have I still to wait?

[sfmskywalker]

@truthz03 Thanks for your PR! At this point there's nothing for you to do, I just need time to review and test. Thank you for your patience.

[truthz03]

@sfmskywalker Hi, can you tell me how long it will take to get my PR merged?

[sfmskywalker]

@truthz03 Hey there, sorry it's been taking a while. I will get this merged this week. Thanks again for your contribution, your PR makes sense!

[sfmskywalker]

@truthz03 Unfortunately, the main branch received an update that uses the PolymorphicObjectConverterFactory as a type in a JsonConverterAttribute - which only works with parameterless constructors.

In other words, we need to revisit either that change, or your change, such that you can still resolve services from DI.

[truthz03]

@sfmskywalker Ok. Let me know if you find a solution.
Maybe its possible to have 2 constructors. One parameterless for the attribute where it is not possible to inject anything and one with parameters.