Now all tests with `Fir` in name are named accordingly to parser which
is used in them -- `FirPsi` or `FirLightTree`. This is needed to keep
consistency between different types of tests, because there is no
single default in parser mode between different scenarios of using FIR
Original `ComponentRegistrar` exposes Project to its registration method,
so plugins should manually register extensions to it. To prepare for
possible unbound compiler from Project API in future new `K2ComponentRegistrar`
introduced which provides registration method without Project at all