Reland "[lldb] Implement basic support for reverse-continue" (#125242)

This reverts commit a774de807e.

This is the same changes as last time, plus:
* We load the binary into the target object so that on Windows, we can
resolve the locations of the functions.
* We now assert that each required breakpoint has at least 1 location,
to prevent an issue like that in the future.
* We are less strict about the unsupported error message, because it
prints "error: windows" on Windows instead of "error: gdb-remote".

lldb/source/Plugins/Process/scripted/ScriptedProcess.cpp

@@ -182,10 +182,15 @@ void ScriptedProcess::DidResume() {
   m_pid = GetInterface().GetProcessID();
 }
 
-Status ScriptedProcess::DoResume() {
+Status ScriptedProcess::DoResume(RunDirection direction) {
   LLDB_LOGF(GetLog(LLDBLog::Process), "ScriptedProcess::%s resuming process", __FUNCTION__);
 
-  return GetInterface().Resume();
+  if (direction == RunDirection::eRunForward)
+    return GetInterface().Resume();
+  // FIXME: Pipe reverse continue through Scripted Processes
+  return Status::FromErrorStringWithFormatv(
+      "error: {0} does not support reverse execution of processes",
+      GetPluginName());
 }
 
 Status ScriptedProcess::DoAttach(const ProcessAttachInfo &attach_info) {