Handle plugin-private stack types in callsite binder

[dain]

A plugin can provide a type with a Java class stack type that is only visible in the plugin. These types can not be used directly in code generated by the engine because the generated code is loaded in a class loader that cannot see these private types. In this case we need to change the stack type in the generated code to Object and adapt any function to use Object instead of the private stack type. We only apply this adaptation for private stack types, to keep generated code more readable.

Fixed #29093

Release notes

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## Section
* Fix compile errors with geometry types. ({issue}`issuenumber`)

[ebyhr]

• Fix compile errors with geometry types. ({issue}issuenumber)

Please replace issuenumber with 29093.