fix(jest): fix a problem with jest and moduleNameMapper

[Tom910]

Jest doesn't support require.resolve method (issue https://github.com/jestjs/jest/issues/9543) and this affected projects if a project has moduleNameMapper configuration. I found this issue when I tried to upgrade version of fastify. I changed the implementation on an alternative solution

Checklist

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