In this way, we can be sure that all nested declarations will be fully
resolved before the outer one. As an example, we had a workaround for
file diagnostics as its `FileStructure` element resolves the file only
to `IMPORTS` phase yet.
Also, this commit probably should improve the performance of highlighting
as we will trigger the resolution from bottom to top while other
highlighting passes will iterate from top to bottom.
^KT-65562
Dmitrii Gridin
addbb713a5