Use CLOUD_PROVIDER instead of host to determine which tests to run (#639)

## What changes are proposed in this pull request?
Use CLOUD_PROVIDER instead of host to determine which tests to run. 

This decouples test run from host parsing and allows testing Cloud
specific features on cloud agnostic hosts.

## How is this tested?
Check test run and validate that the test runs only when expected
<img width="1425" height="97" alt="Screenshot 2026-01-28 at 12 46 22"
src="https://github.com/user-attachments/assets/f01ae9c4-925d-4535-bb9c-ffd90bb0cb37"
/>
<img width="1380" height="72" alt="Screenshot 2026-01-28 at 12 46 51"
src="https://github.com/user-attachments/assets/e7b2ca10-4d7f-4b9a-9251-670c1cc2d0a7"
/>





NO_CHANGELOG=true

Author: hectorcast-db

databricks-sdk-java/src/test/java/com/databricks/sdk/integration/CredentialsIT.java

@@ -11,17 +11,16 @@
 
 @EnvContext("account")
 @DisabledIfEnvironmentVariable(named = "ARM_CLIENT_ID", matches = ".*")
+// Skipping this test for GCP because this api is not enabled in GCP.
+@DisabledIfEnvironmentVariable(named = "CLOUD_PROVIDER", matches = "GCP")
 @ExtendWith(EnvTest.class)
 public class CredentialsIT {
   @Test
   void lists(AccountClient a) {
-    // Skipping this test for GCP because this api is not enabled in GCP.
-    if (!a.config().isGcp()) {
-      Iterable<Credential> list = a.credentials().list();
+    Iterable<Credential> list = a.credentials().list();
 
-      java.util.List<Credential> all = CollectionUtils.asList(list);
+    java.util.List<Credential> all = CollectionUtils.asList(list);
 
-      CollectionUtils.assertUnique(all);
-    }
+    CollectionUtils.assertUnique(all);
   }
 }