feat(platform-fastify): added compatibility for fastify version 5.x 🔥

[Tony133]

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PR Checklist

Please check if your PR fulfills the following requirements:

• [x] The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• [ ] Bugfix
• [x] Feature
• [ ] Code style update (formatting, local variables)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Proposal:

• Added compatibility for Fastify version 5.x 🔥

Does this PR introduce a breaking change?

• [] Yes
• [] No

Other information

It would be nice if NestJS version 10.x was already compatible with Fastify v5.x without waiting for the next major version of NestJS, leaving compatibility with Fastify v4.x