fix: Change the agent type name to not include the account name since…

… this would generate LOTS of tables and cause problems long term (#6158)

The standard in spinnaker is to use a single table for a cache agent TYPE without the account name,

(cherry picked from commit 40bd706)

clouddriver-aws/src/main/java/com/netflix/spinnaker/clouddriver/aws/provider/agent/AmazonInstanceTypeCachingAgent.java

@@ -209,7 +209,7 @@ private List<InstanceTypeInfo> getInstanceTypes(AmazonEC2 ec2) {
 
   @Override
   public String getAgentType() {
-    return String.format("%s/%s/%s", account.getName(), region, getClass().getSimpleName());
+    return getClass().getSimpleName() + "/" + region;
   }
 
   @Override