[BUG] components name doesn't cover situation where multiple stat covariates contain the same category

[anne-devries]

Describe the bug
Before the last release, when one-hot encoding static covariates, the resulting columns would be of the format <original_column_name><value1>, <original_column_name><value2>. But now, the resulting columns are just <value1>, <value2>. However, this causes problems when you have one category that is used by two (or more) static covariates. E.g. temperature could be low/medium/high, and sun_hours could be low/medium/high.

To Reproduce
Steps to reproduce the behavior, preferably code snippet.

Expected behavior
The previous method, where components get the original column name + the category value should be used again to make it more robust

Additional context
See gitter thread: https://matrix.to/#/!uumevxjBaNJhovFYgj:gitter.im/$k0hUoZmhTBemPnKZbMfYPim-Ejq5cfRR2YUIe_2QUcU?via=gitter.im&via=matrix.org&via=matrix.freyachat.eu

[anne-devries]

@dennisbader @madtoinou I will start working on this ticket