fix: when finding the @Module() decorator occurrence

[micalevisk]

PR Checklist

Please check if your PR fulfills the following requirements:

• 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
• 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?

when running nest generate controller when our app.module.ts has any decorator factory before @Module(), the wrong decorator is being changed

import { Injectable, Module, Scope } from '@nestjs/common'

@Injectable({}) // BUG: this will receive the `controllers` prop after nest generate
class Service {}

@Module({
  imports: [],
  providers: [Service],
  controllers: [],
})
export class 

demo-issue-nestjs-cli.webm

What is the new behavior?

1. we can now have any sort of decorators on .module.ts files but only the first @Module({}) occurrence will be update (if found)
2. minor optimization regarding the @Module() decorator look up to use a find-first approach
   instead of find-many

note that we still don't support import aliases such as
import { Module as M } from "@nestjs/core"

Does this PR introduce a breaking change?

• Yes
• No

[kamilmysliwiec]

lgtm