(xray): Invalid template synthesis for X-Ray resources when using Tags.of()

[GavinZZ]

Describe the bug

When using Tags() methods for aws_xray .CfnGroup class and aws_xray .CfnSamplingRule , the tag's Key and Value values are not passcal-cased.

However, in 2.130.0, when using Tags() method behavior for CfnGroup class and CfnSamplingRule, the tag's are not added.

I find that Tags() methods changed in release 2.131.0 https://github.com/aws/aws-cdk/pull/28989/files

Expected Behavior

cdk synth should run successfully

Current Behavior

cdk synth fails due to

Tags:
        - key: Environment # expected is Key: Environment
          value: Prod # expected is Value: Prod

Reproduction Steps

import { Construct } from 'constructs';
import { aws_xray as xray } from 'aws-cdk-lib';

export class AppStack extends cdk.Stack {
  constructor(scope: Construct, id: string, props?: cdk.StackProps) {
    super(scope, id, props);

    const xRay = new xray.CfnGroup(this, 'XRayGroup', {
      groupName: 'ECSSample',
      filterExpression: `ok`,
      insightsConfiguration: {
        insightsEnabled: false,
        notificationsEnabled: false,
      },
    });

    new xray.CfnSamplingRule(this, 'ApplicationRule', {
      samplingRule: {
        ruleName: 'app',
        resourceArn: '*',
        priority: 10,
        fixedRate: 0,
        reservoirSize: 10,
        serviceName: '*',
        serviceType: '*',
        host: '*',
        httpMethod: '*',
        urlPath: '*',
        version: 1,
      },
    });

    cdk.Tags.of(this).add("Environment", "Prod");
  }
}

Possible Solution

Use latest type instead of legacy type for this Tags property.

Additional Information/Context

No response

CDK CLI Version

2.131.0

Framework Version

No response

Node.js Version

18

OS

MacOs

Language

TypeScript

Language Version

No response

Other information

No response

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