f06b17cbb2
Now we have only one FirDesignation instead of `FirDesignation`, `FirDesignationWithFile` and `FirDesignationWithScript` This allows us to unify situations with `FirFile` and `FirScript` in the path and unbind from `FirRegularClass`. This commit only refactors code, the semantic is still the same yet ^KT-65345