[lldb][NFC] Add a test case for Objective-C properties with conflicting names

This is an LLDB test for the ASTImporter crash that got fixed in D99077.
The test is using Clang modules for the properties as it seems the conflicting
names are not actually correctly handled when generating debug information
(only the first property is emitted and the second one is ignored in the current
clang ToT).

GitOrigin-RevId: 69e7b7457809bac02f3e6f7d643c4fb516b31616
5 files changed