cdk 2.31.0 on Node.js Yarn

autoscaling: step scaling policy supports estimatedInstanceWarmup property (#20936) (e4c7b97)
aws-s3: create default bucket policy when required (under feature flag) (#20765) (cefa453), closes /docs.aws.amazon.com/AmazonCloudWatch/latest/logs/AWS-logs-and-resource-policy.html#AWS-logs-infrastructure-S3 #18816
cfnspec: cloudformation spec v78.1.0 (#20952) (20d6e09)
dynamodb: imported tables always grant permissions for indexes (#20682) (4d003a5), closes #13703
ec2: add additional instance type classes (#20972) (400ad91), closes #20924
s3: Event Bridge notification can be enabled after the bucket is created (#20913) (b0b7a32)

cli: standard log messages are sent to stderr when CI=true (#20957) (277340d), closes #7717
cloudfront: fromOriginAccessIdentityName is a misnomer (#20772) (3e58e5a), closes #20141
eks: latest AlbController version isn't compatible with the chart version (#20826) (43a0cec)
route53: cannot delete existing alias record (#20858) (22681b1), closes #20847
stepfunctions-tasks: SqsSendMessage is missing KMS permissions (#20990) (52b7019)
custom resources log sensitive ResponseURL field (#20899) (6b4f92f)

Alpha modules (2.31.0-alpha.0)

batch: add secrets props to job definition (#20871) (9b1051f), closes #19506 #10976