- Restore PlatformManager constructor (used in buildscripts)
- Replace references to deprecated K/N target with 'else'
Why: buildscripts use these references and compile against older K/N
version (from bootstrap). So they can't be adjusted to newer API,
compilation will fail right away. However, they can't be kept without
changes, because bootstrap tests will fail.
^KT-64517
^KT-66500
Dmitry Savvinov
53cbeb8edc