eshop app deletion failure: "cannot create more than 100 manual snapshots"

[willdavsmith]

I have been debugging deletion failures for AWS eShop and after some research, it looks like we're hitting a quota on RDS DB Snapshots.

❯ aws cloudcontrol get-resource-request-status --request-token b491c6fc-5bc1-4cb1-8d0e-9d322e9dce40
{
    "ProgressEvent": {
        "TypeName": "AWS::RDS::DBInstance",
        "Identifier": "rds-dbinstance-2cef73jte67sg",
        "RequestToken": "b491c6fc-5bc1-4cb1-8d0e-9d322e9dce40",
        "Operation": "DELETE",
        "OperationStatus": "FAILED",
        "EventTime": "2023-11-20T09:46:06.414000-08:00",
        "StatusMessage": "cannot create more than 100 manual snapshots (Service: Rds, Status Code: 400, Request ID: d6f46375-55f8-4214-86b1-1449a47fe82d)",
        "ErrorCode": "ServiceLimitExceeded"
    }
}

AB#10427

[kachawla]

Added flaky-test label since this issue is causing flakiness in the Test Samples workflow (example: #923).