Add lldb smoke test (#1241)

* add lldb runner

* don't build wasmtime

* use brew's lldb

* disable for macos

* set LLDB on linux

* re-org gh actions and cfg

* address feedback

tests/debug/main.rs

@@ -1,4 +1,5 @@
 mod dump;
+mod lldb;
 mod obj;
 mod simulate;
 mod translate;