Rework rendering of kt-like dump and signatures dump in order to avoid
unstable blank line between declarations of the same level:
1. No blank line for the first declaration inside the member scope of
the class.
2. Always a single blank line between each two subsequent declarations
inside the member scope of the class.
Refactor the renderer, make BoundSymbolReferenceRenderer a static class
to prevent calling RenderIrElementVisitor's methods from it to avoid
infinite recursion in the future.
^KT-52677 Fixed
Pavel Kunyavskiy