feat: enable forbidUnknownValues by default

[NoNameProvided]

Description

This PR enables forbidUnknownValues by default. This is done to prevent objects pass validation when no check would be done on them. After this change is released any validated object that has no metadata associated with it will fail the validation.

One notable example of this is validating with groups. If the called validation excludes all metadata due to the specified group then the validation will fail from now on instead of passing. Example:

class MyPayload {
    @IsString({ groups: ['A']})
    property: string;

    constructor(property: string) {
      this.property = property;
    }
}

validate(new MyPayload('value'), { groups: ['B'] }).then(console.log);

Calling the above will result in an error from now on:

[
  ValidationError {
    target: MyPayload { property: 'value' },
    value: undefined,
    property: undefined,
    children: [],
    constraints: {
      unknownValue: 'an unknown value was passed to the validate function'
    }
  }
]

Checklist

• the pull request title describes what this PR does (not a vague title like Update index.md)
• the pull request targets the default branch of the repository (develop)
• the code follows the established code style of the repository
  • npm run prettier:check passes
  • npm run lint:check passes
• tests are added for the changes I made (if any source code was modified)
• documentation added or updated
• I have run the project locally and verified that there are no errors

Fixes

references #438, references #1422

[github-actions]

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