[ty] Set INSTA_FORCE_PASS and INSTA_OUTPUT environment variables from mdtest.py

Author: AlexWaygood

crates/ty_python_semantic/mdtest.py

@@ -106,7 +106,7 @@ def _run_mdtest(
         return subprocess.run(
             [self.mdtest_executable, *arguments],
             cwd=CRATE_ROOT,
-            env=dict(os.environ, CLICOLOR_FORCE="1"),
+            env=dict(os.environ, CLICOLOR_FORCE="1", INSTA_FORCE_PASS="1", INSTA_OUTPUT="none"),
             capture_output=capture_output,
             text=True,
             check=False,