ci: Display performance measurement results as custom metrics

[k2tzumi]

The author should do the following, if applicable

• [ ] Add tests
• [ ] Run tests
• [ ] bun run format:fix && bun run lint:fix to format the code
• [ ] Add TSDoc/JSDoc to document the code

What's this all about?

This will be an improvement in type checking performance monitoring added by the following Pull Request. https://github.com/honojs/hono/pull/3406

In conjunction with octocov, type checking performance will be displayed as Pull Request comments and CI summary as follows

• Pull Request comments

• CI summary