v2.55.0

autoscaling: support default instance warmup for Auto Scaling groups (#23285) (3f706e2)
cfnspec: cloudformation spec v101.0.0 (#23294) (3951f09)
cognito: add new AdvancedSecurityMode property (#23261) (9cc9bd3)
core: add volumes-from option to docker run command for bundling (#22829) (813c2f1), closes #8799 #21660
s3: update runtime of notifications-handler to python3.9 (#23209) (b2d293d)
s3-deployment: add additional sources with addSource (#23321) (b34d0b7), closes #22857

cloudwatch: math expressions incorrectly warn about metricsinsights variable names (#23316) (55108b9)
core: cross stack references to string lists break (#22873) (3ddb8cf), closes /docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-vpcendpoint.html#aws-resource-ec2 #21682
custom-resources: inactive lambda functions fail on invoke (#22612) (def2971), closes #20123
ec2: Invalid security group ID (#22859) (c2043c8), closes aws-cdk/aws-ec2/lib/peer.ts#L224
ecr: grants for cross-account principals result in failed deployments (#16376) (84e20f8), closes #15070
opensearch: Don't throw a Az count mismatch for imported VPCs (#22654) (6a28b7f), closes #22651

"chore: save exclusion rules when bumping the CFN spec (#22788)" (#23282) (cc76cfb)

Alpha modules (2.55.0-alpha.0)

appsync: DataSource.createResolver,
DataSource.createFunction, and GraphQlApi.createResolver now require
2 arguments instead of 1.
appsync: Renames Schema to SchemaFile that implements ISchema. Removes all addXxx type methods from GraphQlApi.

aws-lambda-python: add command hooks for bundling to allow for execution of custom commands in the build container (#23330) (d3d071f)
gamelift: add GameSessionQueue L2 Construct for GameLift (#23266) (1ded644)

appsync: unexpected resolver replacement (#23322) (6dc15d4), closes #13269
servicecatalogappregistry: synth error when associating a nested stack (#23248) (30301d9)