[Storage] Use relevant subscriptions in weekly pipeline. (Azure#23821)

* [Storage] Use relevant subscriptions in weekly pipeline.

Use relevant subscriptions in weekly pipeline. Like we did for .NET https://github.com/Azure/azure-sdk-for-net/blob/5266d2dfe8780b481248789244887da7b6662cc5/sdk/storage/tests.yml#L16 .

- Testing Public and Canary subscription doesn't bring much value for storage tests, it's a repeat of what we do in Preview.
- The PrivatePreview has few changes that'd be good to get early test feedback in java as well.

* Update tests.yml

* Update tests.yml

Author: kasobol-msft

sdk/storage/tests.yml

@@ -43,7 +43,13 @@ stages:
       TestMode: 'LIVE'
       TimeoutInMinutes: 60
       Location: canadacentral
-      Clouds: 'Preview'
+      CloudConfig:
+        Preview:
+          SubscriptionConfiguration: $(sub-config-azure-cloud-test-resources-preview)
+        PrivatePreview:
+          SubscriptionConfiguration: $(sub-config-storage-test-resources)
+      Clouds: Preview
+      SupportedClouds: Preview
       TestStepMavenInputs:
         options: '$(DefaultTestOptions) $(AdditionalOptions) -T 1C'
         mavenOptions: '$(DefaultTestMavenOptions)'