[K/N] Migrate LLDB test to blackboxtest

This change only introduces a single sample test together
with the necessary plumbing for basic LLDB testing.
Migrating the rest of the tests over and introducing more
complex interop setups will be tackled as a follow-up.

native/native.tests/testData/lldb/canStepThroughCode.txt

@@ -0,0 +1,23 @@
+> b main.kt:4
+Breakpoint 1: [..]
+
+> r
+Process [..] stopped
+[..] stop reason = breakpoint 1.1
+[..] at main.kt:4[..]
+
+> n
+Process [..] stopped
+[..] stop reason = step over
+[..] at main.kt:5[..]
+
+> n
+Process [..] stopped
+[..] stop reason = step over
+[..] at main.kt:6[..]
+
+> n
+Process [..] stopped
+[..] stop reason = step over
+[..] at main.kt:7[..]
+> q