[PLAT-15781] Add try/catch block for fetching access key

Summary: Add try/catch block for fetching access key.

Test Plan:
Created a universe using YNP.
Performed shrink universe.
Verified that operation is successful.

Reviewers: anijhawan, nbhatia, skhilar

Reviewed By: anijhawan

Subscribers: yugaware

Differential Revision: https://phorge.dev.yugabyte.com/D39246

Author: Shubham

managed/src/main/java/com/yugabyte/yw/commissioner/tasks/UniverseTaskBase.java

@@ -2161,9 +2161,15 @@ protected void deleteNodeAgent(NodeDetails nodeDetails) {
       Cluster cluster = getUniverse().getCluster(nodeDetails.placementUuid);
       Provider provider = Provider.getOrBadRequest(UUID.fromString(cluster.userIntent.provider));
       if (provider.getCloudCode() == CloudType.onprem) {
-        AccessKey accessKey =
-            AccessKey.getOrBadRequest(provider.getUuid(), cluster.userIntent.accessKeyCode);
-        if (accessKey.getKeyInfo().skipProvisioning) {
+        try {
+          AccessKey accessKey =
+              AccessKey.getOrBadRequest(provider.getUuid(), cluster.userIntent.accessKeyCode);
+          if (accessKey.getKeyInfo().skipProvisioning) {
+            return;
+          }
+        } catch (Exception e) {
+          // Access Key are optional for onprem providers. We can return in case it is not
+          // present as the nodes will be manually provisioned.
           return;
         }
       }