aws-cdk: s3: websiteRoutingRule doesn't allow empty keyPrefixEquals

Describe the bug

When setting up an S3 bucket with

        {
          condition: { keyPrefixEquals: "" },
          protocol: RedirectProtocol.HTTPS,
          hostName: "example.com",
          replaceKey: ReplaceKey.with("/"),
        },

it causes

Error: The condition property cannot be an empty object

Expected Behavior

It should work.

Current Behavior

Error: The condition property cannot be an empty object

Reproduction Steps

Set up a bucket with

        {
          condition: { keyPrefixEquals: "" },
          protocol: RedirectProtocol.HTTPS,
          hostName: "example.com",
          replaceKey: ReplaceKey.with("/"),
        },

Possible Solution

In this line: https://github.com/aws/aws-cdk/blob/main/packages/aws-cdk-lib/aws-s3/lib/bucket.ts#L2321

it should be

if (rule.condition && rule.condition.httpErrorCodeReturnedEquals != null && rule.condition.keyPrefixEquals != null) {

instead of

if (rule.condition && !rule.condition.httpErrorCodeReturnedEquals && !rule.condition.keyPrefixEquals) {

Additional Information/Context

No response

CDK CLI Version

2.72.1

Framework Version

No response

Node.js Version

16.14.12

OS

Mac

Language

Typescript

Language Version

No response

Other information

No response