`OperatorType.get_name` callback is supposed to return strings directly
usable in the UI, i.e. translated if needed.
Several callbacks did not, noticiably the generic
`ED_select_pick_get_name` and `ED_select_circle_get_name` ones.
And the `sculpt_color_filter_get_name` was not using available RNA
helpers for enum items has it should have.
Finally, `RNA_property_enum_name_gettexted` and
`RNA_property_enum_item_from_value_gettexted` were also not using the
optimal higher-level translation API.
Noticed while reviewing !110776.
203e6e2b41