[lldb][test] Skip the API tests a WebAssembly target cannot support (#213788)

This is the final batch of skips. Together with a handful of local
changes to LLDB and WAMR, the test suite now passes when targeting
WebAssembly. Each test has a short comment explaining why it's skipped.

GitOrigin-RevId: 01c29d71bdcce48d499e34223d1866fedee9a83b