Tap15.0.1 support

[veritem]

Migrate tests to tap15.0.1

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[climba03003]

I think the main problem is bulk replace. Some of them should not be replaced.

For example:
https://github.com/fastify/fastify/blob/main/test/async-await.test.js#L425
https://github.com/makuzaverite/fastify/blob/tap15Support/test/async-await.test.js#L425

[climba03003]

I think you should run a local test before committing. It should fail even in local environment.

[veritem]

Thanks @climba03003 had a wrong select and replace inside my vscode

[climba03003]

Can you double check it is not missing any of the wrong replacement? I may miss some of them when I glance through this big changes.

[mcollina]

lgtm, thanks for the gargantuan effort!

[zekth]

lgtm huge work

[github-actions]

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