[lldb] Fixed the TestCompletion test running on a remote target (#92281)

Install the image to the remote target if necessary.

Author: slydiman

lldb/test/API/functionalities/completion/TestCompletion.py

@@ -107,9 +107,16 @@ def test_process_unload(self):
             self, "// Break here", lldb.SBFileSpec("main.cpp")
         )
         err = lldb.SBError()
-        self.process().LoadImage(
-            lldb.SBFileSpec(self.getBuildArtifact("libshared.so")), err
+        local_spec = lldb.SBFileSpec(self.getBuildArtifact("libshared.so"))
+        remote_spec = (
+            lldb.SBFileSpec(
+                lldbutil.append_to_process_working_directory(self, "libshared.so"),
+                False,
+            )
+            if lldb.remote_platform
+            else lldb.SBFileSpec()
         )
+        self.process().LoadImage(local_spec, remote_spec, err)
         self.assertSuccess(err)
 
         self.complete_from_to("process unload ", "process unload 0")
@@ -473,7 +480,7 @@ def test_custom_command_completion(self):
         self.complete_from_to("my_test_cmd main.cp", ["main.cpp"])
         self.expect("my_test_cmd main.cpp", substrs=["main.cpp"])
 
-    @skipIfWindows
+    @skipIf(hostoslist=["windows"])
     def test_completion_target_create_from_root_dir(self):
         """Tests source file completion by completing ."""
         root_dir = os.path.abspath(os.sep)