[cloud] Fix data types in ec2_elb_lb causing resource to be spuriously updated (#21906)

fixes broken idempotence caused by the idle_timeout and cross_az_load_balancing params. (#21906)

lib/ansible/modules/cloud/amazon/ec2_elb_lb.py

@@ -1242,8 +1242,8 @@ def main():
         purge_subnets={'default': False, 'required': False, 'type': 'bool'},
         scheme={'default': 'internet-facing', 'required': False},
         connection_draining_timeout={'default': None, 'required': False},
-        idle_timeout={'default': None, 'required': False},
-        cross_az_load_balancing={'default': None, 'required': False},
+        idle_timeout={'default': None, 'type': 'int', 'required': False},
+        cross_az_load_balancing={'default': None, 'type': 'bool', 'required': False},
         stickiness={'default': None, 'required': False, 'type': 'dict'},
         access_logs={'default': None, 'required': False, 'type': 'dict'},
         wait={'default': False, 'type': 'bool', 'required': False},