Use same data object for teal_data and in modules

[nikolas-burkoff]

todo: Send teal_data to the modules instead of tdata.

This will break all the modules, so it needs to be done together with:

• Fix datasets arg in data_extract_srv, merge_expression_srv to work with teal_data teal.transform#159
• Fix modules to use teal_data instead of tdata teal.modules.general#588
• Fix modules to use teal_data instead of tdata teal.modules.clinical#838
• Fix modules to use teal_data instead of tdata teal.modules.hermes#338
• Fix modules to use teal_data instead of tdata teal.osprey#230
• Fix modules to use teal_data instead of tdata teal.goshawk#242
• https://github.com/insightsengineering/teal.modules.helios/issues/101

[nikolas-burkoff]

CodeClass has important feature which we can't find an alternative. In CodeClass one can extract code of particular datasets as it keeps "dataname" attribute with all code-elements. This is important in module_nested_tabs where module gets subset of datasets and code.

Fair enough, so maybe CodeClass could be built on top of qenv rather than being completely independent etc.