* Do not offer convert to static import when name collision exists

- modify QuickAssistProcessor.getAddStaticImportProposals() to check
  for a collision with an unqualified reference
- add new UnqualifiedReferencesFinder class to QuickAssistProcessorUtil
- add new test to AssistQuickFixTest
- fixes #2045

* Version bump(s) for 4.36 stream

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Co-authored-by: Eclipse JDT Bot <jdt-bot@eclipse.org>