Update sdk_file_end.go.tpl to not use OutputShape name for hook method

[vijtrip2]

Issue #, if available: aws-controllers-k8s/community#1019

Description of changes:

• Main changes in sdk_file_end.go.tpl , others files are auto-generated using latest code-generator and latest runtime
• Previously the method was named set{{ $outputShape.ShapeName }}Output which caused the method name to be "setCreateReplicationGroupOutputOutput" and existing custom_update_api.go started failing. See #61
• I do not know why elasticache team did not chose to name the method statically as setReplicationGroupOutput but templatized it.
• Keep the existing templatization in mind, I updated the template to produce methodName and parameter as earlier, which compiles successfully with custom_update_api.go
• Note: This regression occured because GetOutputShape started to correctly return Output shape as part of this commit

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[a-hilaly]

👍

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This pull-request has been approved by: A-Hilaly, nmvk, vijtrip2

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