Unify effective UI schema options

[edgarmueller]

Describe the bug
Each renderer calculates its effective UI schema options by merging the global config object with the options of an UI schema element (see #1465). As the code is the same for each renderer we should think about whether we want to actually pass down the global config object to the renderers.
Instead we could replace the config prop with effectiveUiSchemaOptions or something similar which would hold the result of merge({}, config, uischema.options).