[lldb-dap] Report exit status message in lldb-dap, same as lldb cli (#89405)

Summary:
When the target inferior process that is being debugged exits in lldb
command line, it emits following message:
`Process 4049526 exited with status = -1 (0xffffffff) debugserver died
with signal SIGTERM`
lldb-dap on the other hand does not emit a similar message. This PR adds
the same status message to lldb-dap.

Test Plan:
In VSCode debug any target and hit stop mode, kill lldb-server and
observe an exit status message similar to the following: Process 2167677
exited with status = -1 (0xffffffff) debugserver died with signal
SIGTERM

Reviewers:
@jeffreytan81,@clayborg,@kusmour,

Subscribers:

Tasks:
lldb-dap

Tags:

lldb/source/API/SBProcess.cpp

@@ -928,6 +928,14 @@ size_t SBProcess::WriteMemory(addr_t addr, const void *src, size_t src_len,
   return bytes_written;
 }
 
+void SBProcess::GetStatus(SBStream &status) {
+  LLDB_INSTRUMENT_VA(this, status);
+
+  ProcessSP process_sp(GetSP());
+  if (process_sp)
+    process_sp->GetStatus(status.ref());
+}
+
 bool SBProcess::GetDescription(SBStream &description) {
   LLDB_INSTRUMENT_VA(this, description);