resource/aws_route53_record: Update error message to be inline with implementation and docs. (#15757)
resource/aws_route53_record: Update error message to be inline with implementation and docs. (#15757)

Previously this error message was misleading as it gave no indication that a Set
Identifier may be required when looking up a aws_route53_record.
terraform-providers/terraform-provider-aws,terraform-providers/terraform-provider-aws,terraform-providers/terraform-provider-aws,terraform-providers/terraform-provider-aws