`getReturnTypeForKtDeclaration` is called by UAST on probably compiled declarations.
In order to avoid redundant decompilation + building raw FIR + resolve,
let's delegate to deserialized FIR which is already prepared in stubs
Fixes KTIJ-24810
When `findSourceNonLocalFirDeclaration` is called on non-physical property accessor e.g.,
during completion, then traverse tree should allow drilling into FirProperty;
otherwise, no FIR would be found
Anna Kozlova
09f4f0af66