[BUG]: Need to set Stratify's param_renaming_uses_strata_names to True

[liunelson]

Currently, Stratify Model creates new parameters with name like <param_name>_0, <param_name>_1, ... instead of using the strata names that the user provides.

In the most recent version of MIRA, Ben added a new argument to mira.metamodel.ops.stratify called param_renaming_uses_strata_names to toggle whether the newly created parameters are named <param_name>_<strata_name_0>, <param_name>_<strata_name_1>, ...

TLDR: we should call mira.metamodel.ops.stratify(..., param_renaming_uses_strata_names = True)

This might impact the UI parameter matrix generation?