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ECS Deployment errors with "All server group names for cluster....are taken"

Issue​

A transient issue occurs with the ECS deployment stage, across multiple pipelines within the same application.  This issue can occur even across different server group names. The following error is observed:  All server group names for cluster .....are taken. All server group names for cluster ...are taken. The UI shows the following:

Cause​

The issue is as a result of hitting a limit on the number of possible server group names in Spinnaker (e.g. there may be over 1000 versions of a specific serverGroup), and the NameBuilder that is capped at 1000.  https://github.com/spinnaker/clouddriver/blob/01f415f318a15970729b4415167e64eafeca9593/clouddriver-core/src/main/groovy/com/netflix/spinnaker/clouddriver/helpers/AbstractServerGroupNameResolver.groovy#L31 It is very rare to hit this limit of 1000 ECS server groups within a cluster, and it does not impact every v2.24 environment.