Currently, we pass the UpgradeExecutionDependencies when creating the upgrade plan and also when creating the schema upgrade client. Its properties are used only partially depending on the use case, essentially making it a container to hold dependencies for multiple purposes. We should find a better way for the client classes to access these dependencies to stop this DTO bloating and preferably remove the need for it entirely.

Hints:

• Context: https://github.com/camunda/camunda-optimize/pull/3430#discussion_r620037374
• Perhaps a dedicated service that encapsulates all of the dependencies so they don't need to be passed as params would be better