Track changes in K/N stubs directly instead of using the hack with
KlibMetaFileType.STUB_VERSION + KotlinStubVersions.BUILTIN_STUB_VERSION.
Changes in built-in stubs might or might not affect .knm stubs and
should be tracked independently.
The used offset constant for migration is the sum of the offsets from
KlibMetaFileType and KotlinStubVersions.BUILTIN_STUB_VERSION.
KTIJ-26761
KTIJ-26961
Pavel Kirpichenkov
237f90d289