fix(core): cdk diff on large templates fails when passing in toolkitStackName and qualifier

[sumupitchayan]

Closes #29179

Reason for this change

If your account is bootstrapped with a custom toolkitStackName or qualifier, then running cdk diff does not work for large diff templates of over 50 KiB in size.

Description of changes

The toolkitStackName was not passed down all the way through the cdk diff code path - this PR fixes the issue by adding the optional toolkitStackName property to the DiffOptions interface in cdk-toolkit.ts and passing that value all the way through the diff code path to the uploadBodyParameterAndCreateChangeSet function in cloudformation.ts, where the template asset is built and published.

Description of how you validated changes

I created a CDK app locally and ran the commands (exactly following the reproduction steps from the original issue) using the CLI build from this PR and was able to successfully run cdk diff without needing to pass in the --toolkit-stack-name flag.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

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AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: af9ef46
• Result: SUCCEEDED
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