fix: add missing policies for the autoscaler (#1328)

## Description

The policies `autoscaling:CompleteLifecycleAction` and
`autoscaling:DescribeLifecycleHooks` were missing for the autoscaler.
This PR adds them.

`Aug 11 19:52:40 ip-172-21-252-42 monitor_runner.sh[31313]: An error
occurred (AccessDenied) when calling the DescribeLifecycleHooks
operation: User:
arn:aws:sts::[ACCOUN_ID]:assumed-role/runners-fleet-test-instance/i-00a91317465c7587a
is not authorized to perform: autoscaling:DescribeLifecycleHooks because
no identity-based policy allows the autoscaling:DescribeLifecycleHooks
action`

Relates to #1316

Author: kayman-mk

policies/instance-docker-autoscaler-policy.json

@@ -5,7 +5,9 @@
             "Effect": "Allow",
             "Action": [
                 "autoscaling:SetDesiredCapacity",
-                "autoscaling:TerminateInstanceInAutoScalingGroup"
+                "autoscaling:TerminateInstanceInAutoScalingGroup",
+                "autoscaling:CompleteLifecycleAction",
+                "autoscaling:DescribeLifecycleHooks"
             ],
             "Resource": "${autoscaler_asg_arn}"
         },