Port scip-kotlinc test cases from #973 to KotlinAnalysisIndexerTest

#973 added 17 test cases to scip-kotlinc's AnalyzerTest and extended
`type operators`; replacing scip-kotlinc deleted them. Run the same
sources through KotlinAnalysisIndexer instead, using a copy of the
ScipBuilders DSL.

The #973 output changes are not part of scip-kotlin-analysis yet, so the
expectations follow its current output:
- No `kind` or `enclosing_symbol` assertions.
- Extension functions and properties keep top-level symbols
  (`sample/foo().` instead of `sample/String#foo().`).
- Enum entries render as `val`, and members of an enum entry body are
  `sample/Op#PLUS.apply().` instead of locals of an anonymous class.
- `Foo.Factory` emits separate `Foo#` and `Foo#Factory#` references,
  an implicit companion receiver references `Bar#Companion#`, and the
  unnamed companion definition range ends at the end of its first line.

Signature assertions for local functions and extension receivers are
dropped: scip-kotlin-analysis currently renders `public final fun
inner()` for local functions and omits the extension receiver.

Co-authored-by: Amp <amp@ampcode.com>
Amp-Thread-ID: https://ampcode.com/threads/T-01a153c0-ec1f-774a-993c-bca3256017ce

Author: christoph-sg