Fixes opctl auth parameter.

Author: mrDzurb

ads/opctl/config/merger.py

@@ -124,7 +124,10 @@ def _fill_config_with_defaults(self, ads_config_path: str) -> None:
                     exec_config.get("auth") or AuthType.API_KEY
                 )
         # determine profile
-        if self.config["execution"]["auth"] == AuthType.RESOURCE_PRINCIPAL:
+        if self.config["execution"]["auth"] in (
+            AuthType.RESOURCE_PRINCIPAL,
+            AuthType.INSTANCE_PRINCIPAL,
+        ):
             profile = self.config["execution"]["auth"].upper()
             exec_config.pop("oci_profile", None)
             self.config["execution"]["oci_profile"] = None