[infra] owners for third_party/pkg status files

Change-Id: I5baa813a75181f371636b44ee0b98141b641226f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/296202
Reviewed-by: Jonas Termansen <sortie@google.com>
Commit-Queue: Daco Harkes <dacoharkes@google.com>

third_party/OWNERS

@@ -1,2 +1,6 @@
 file:/tools/OWNERS_FOUNDATION #{LAST_RESORT_SUGGESTION}
 file:/tools/OWNERS_INFRA #{LAST_RESORT_SUGGESTION}
+
+# Test status files
+per-file pkg/c_compiler.status=file:/tools/OWNERS_VM
+per-file pkg/native_assets_cli.status=file:/tools/OWNERS_VM