There was one monolith protobuf at irHeader.knd, it was
split up onto 4 parts due to performance issues:
- a small irHeader with some basic info about a module
- symbols table
- types table
- strings table
These 3 tables are then mmapped and accessed by index.
These properties have a very specific detail in their behavior, in that
the constructor's name is set to be "<init>". While this is OK for the
IR serialization, this may not always be expected in other cases, and
their rather common names (`name`, `fqNameSafe`) suggested that these
properties could be used in generic contexts.
Change all usages outside IR serialization to use
`IrDeclarationWithName.name` and nullable
`IrDeclarationWithName.fqNameWhenAvailable` instead
Roman Artemev