[lldb][test] Rename/remove duplicate methods in API tests (#180250)

Ran my python script from
https://github.com/llvm/llvm-project/pull/97043 over the repo again and
there were 2 duplicate test-cases that have been introduced since I last
did this.

Also one of the WASM classes had a duplicate method which I just
removed.

GitOrigin-RevId: a07347f60997b971314563c7427aff5153677d95