Bug: Validation::withRequest() method does not receive data.

[iRedds]

Describe the bug
https://forum.codeigniter.com/thread-79028.html
If method spoofing is used in the html form, then the validation class cannot receive data when using Validation::withRequest() if the enctype="multipart/form-data" attribute was set.

If the method is defined as put, patch or delete, then the validation class tries to get data from the request body (php://input). But if multipart/form-data is used then php://input will be empty.
https://www.php.net/manual/en/wrappers.php.php#wrappers.php.input

CodeIgniter 4 version
4.1.1 and develop

Affected module(s)
Validation class

Expected behavior, and steps to reproduce if appropriate
Expected behavior: When using encoding and multipart/form-data and method spoofing, do not use reading from php://input

Bug reproduction:

// Route
$routes->add('/', 'Home::index');

// controller method 
if ($this->request->getMethod() !== 'get') {
    $rules = ['test' => 'required'];
    if (! $this->validate($rules)) {
       dd($this->validator->getErrors(), $this->request->getVar());
    }
} else {
    echo '<form action="/" method="post" enctype="multipart/form-data">
    <input type="hidden" name="_method" value="put">
    <input type="text" name="test" value="passed">
    <input type="submit">
    </form>';
}

Context

• OS: Windows 7
• Web server PHP
• PHP version 7.3