Bump @aws-sdk/client-appsync from 3.309.0 to 3.478.0 #1237

Job	Run time
setup-common-test	1m 4s
style	1m 25s
readonly tests	3m 54s
setup-basic-integration-test	1m 13s
setup-module-test	1m 5s
iasql_upgrade test	5m 4s
lint	1m 12s
common.test.AWS_DIFF	1m 12s
common.test.GET_SQL_SINCE	3m 48s
common.test.CANONICAL_IAM_POLICY	1m 6s
common.test.TOTAL_FAILURE	3m 44s
common.test.CREATE_REVIEW	3m 47s
common.test.METADATA	3m 46s
common.test.BASIC_DB	2m 44s
common.test.TABLE_ACCESS	2m 45s
common.test.ALL_MODULES_HAVE_TABLES	3m 47s
common.test.SIMPLE_INTEGRATION	5m 11s
common.test.DEP_SORTING	1m 10s
build-and-push	3m 24s
basic-integration.test.GET_SQL_FOR_TRANSACTION	55s
basic-integration.test.REVERT	1m 1s
basic-integration.test.COMMIT	1m 14s
basic-integration.test.AUTOMATIC_MODE	55s
basic-integration.test.INSTALL	53s
basic-integration.test.ROLLBACK	1m 9s
basic-integration.test.UNINSTALL	1m 5s
module test ${{ matrix.module }}	0s
get-pr-debug-info	0s
log-pr-debug-info	0s
	58m 33s

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