fix: class-validators and nest.js: Global custom validator with imports from two different modules is only triggered in one of the two modules

[SakisTsalk]

Description

I am using Nest.js and class-validator. If the same validator is being used in two different modules, and Dto Objects from both of the modules are being used inside the validator, the validator only triggers in one of the two modules. Main suspect is a circural dependency.

Minimal code-snippet showcasing the problem
https://github.com/SakisTsalk/nestjs-custom-validators-issue
Steps to reproduce:

1. install dependencies and start application
   yarn install
yarn start:dev
2. Make two POST requests
   curl --location 'http://localhost:3000/dogs/create' \ --header 'Content-Type: application/json' \ --data '{ "dog": { "name": "rex" } }'
curl --location 'http://localhost:3000/cats/create' \ --header 'Content-Type: application/json' \ --data '{ "cat": { "name": "kittie" } }'

Expected behavior

I would expect that an error is thrown during build time or at least when the validator is triggered.

Actual behavior

No error is thrown the validator works correctly in one of the modules, but is completely ignored from the other module

Same issue reported in nest.js side:
nestjs/nest#12847