feat(api-graphql): add `.enums` property to the GQL client #4177

Job	Run time
prebuild	3m 20s
license-test / License tests	29s
bundle-size-tests / Bundle size tests	1m 42s
dependency-review / Dependency Review	11s
github-actions-test / Github Action format test	33s
tsc-compliance-test / TSC Compliance Test	33s
unit-tests / get-package-list / Get packages list	6s
unit-tests / Unit Test - @aws-amplify/adapter-nextjs	57s
unit-tests / Unit Test - @aws-amplify/analytics	58s
unit-tests / Unit Test - @aws-amplify/api	46s
unit-tests / Unit Test - @aws-amplify/api-graphql	1m 1s
unit-tests / Unit Test - @aws-amplify/api-rest	41s
unit-tests / Unit Test - @aws-amplify/auth	1m 59s
unit-tests / Unit Test - aws-amplify	54s
unit-tests / Unit Test - @aws-amplify/core	1m 15s
unit-tests / Unit Test - @aws-amplify/datastore	4m 58s
unit-tests / Unit Test - @aws-amplify/datastore-storage-adapter	56s
unit-tests / Unit Test - @aws-amplify/geo	50s
unit-tests / Unit Test - @aws-amplify/interactions	41s
unit-tests / Unit Test - @aws-amplify/notifications	1m 6s
unit-tests / Unit Test - @aws-amplify/predictions	48s
unit-tests / Unit Test - @aws-amplify/pubsub	39s
unit-tests / Unit Test - @aws-amplify/react-native	36s
unit-tests / Unit Test - @aws-amplify/rtn-push-notification	39s
unit-tests / Unit Test - @aws-amplify/rtn-web-browser	32s
unit-tests / Unit Test - @aws-amplify/storage	1m 6s
Unit and Bundle tests have passed	1s
ci - Unit and Bundle tests have passed	1s
	28m 18s

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