Eliminate `newNakedSymbol` methods
Eliminate `newNakedSymbol` methods

These methods produce a partially initialized symbol, which is dangerous for any code
using them. It turns out that any delays in the symbol initialization we need can be
provided by the symbol's completer.

dotty-staging/dotty,dotty-staging/dotty,dotty-staging/dotty,sjrd/dotty,lampepfl/dotty,sjrd/dotty,sjrd/dotty,lampepfl/dotty,lampepfl/dotty,lampepfl/dotty,dotty-staging/dotty,dotty-staging/dotty,lampepfl/dotty,sjrd/dotty,sjrd/dotty