graceful exit for aqua cli

Author: VipulMascarenhas

ads/aqua/__init__.py

@@ -41,4 +41,3 @@ def set_log_level(log_level: str):
         logger.error(
             f"Aqua is not available for this notebook session {NB_SESSION_OCID}."
         )
-    exit()

ads/aqua/cli.py

@@ -5,7 +5,7 @@
 # Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl/
 import os
 
-from ads.aqua import ENV_VAR_LOG_LEVEL, set_log_level
+from ads.aqua import ENV_VAR_LOG_LEVEL, set_log_level, ODSC_MODEL_COMPARTMENT_OCID
 from ads.aqua.deployment import AquaDeploymentApp
 from ads.aqua.evaluation import AquaEvaluationApp
 from ads.aqua.finetune import AquaFineTuningApp
@@ -41,3 +41,6 @@ def __init__(
             'WARNING', 'ERROR', and 'CRITICAL'.
         """
         set_log_level(log_level)
+        # gracefully exit if env var is not set
+        if not ODSC_MODEL_COMPARTMENT_OCID:
+            exit()