feat: add updated_at attribute to Bedrock guardrail #35530

Job	Run time
markdown-lint	20s
misspell	34s
go mod download	13s
cache-info	1m 2s
terraform fmt	17s
go build	3m 55s
Sweeper Functions Not Linked	4m 10s
go generate	5m 53s
import-lint	1m 21s
go test (shard 1)	5m 5s
go test (shard 3)	3m 48s
go test (shard 0)	3m 57s
go test (shard 2)	4m 45s
	35m 20s

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