Update to 12.1 EAP (IDEA 128.101)
Enable SELECT_AUTOPOPUP_SUGGESTIONS_BY_CHARS settings in tests
Refactor test: remove irrelevant code
Added annotation to fix test.
Added commitAllDocuments() to avoid failing tests.
Removed redundant annotation to avoid indeterministic test failing.

It was failing because of duplication of the same annotation in IDEA JDK annotations and Kotlin JDK annotations.