[12.x]: Add 'doesntContain' validation rule

[KIKOmanasijev]

This PR introduces the doesnt_contain validation rule, which ensures an array does not contain any of the specified values. It complements the existing contains rule, which validates that an array includes all specified values.

Like contains, doesnt_contain supports a string-like format (e.g., 'field' => 'doesnt_contain:spam') and is implemented in Illuminate\Validation\Validator with a corresponding DoesntContain rule class.

How to use it

Passing example

use Illuminate\Support\Facades\Validator;

// ✅ passes
$validator = Validator::make(
    ['tags' => ['php', 'laravel', 'symfony']],
    ['tags' => 'required|array|doesnt_contain:javascript']
);

Failing example

use Illuminate\Support\Facades\Validator;

// ❌ fails
$validator = Validator::make(
    ['tags' => ['php', 'laravel', 'symfony']],
    ['tags' => 'required|array|doesnt_contain:php']
);

Passing example using Rule class syntax:

use Illuminate\Support\Facades\Validator;

// ✅ passes
$validator = Validator::make(
    ['tags' => ['php', 'laravel', 'symfony']],
    [
        'tags' => [
            'required',
            'array',
            Rule::doesntContain('javascript')
        ]
    ]
);