…y PHP error into \ErrorException (yceruto)

This PR was merged into the 4.4 branch.

Discussion
----------

[ErrorHandler] Added call() method utility to turns any PHP error into \ErrorException

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #32936
| License       | MIT
| Doc PR        | symfony/symfony-docs#...

**Issue**

There is no easy way to catch PHP warnings, though some progress has been made in this area for PHP 8.0 (https://wiki.php.net/rfc/consistent_type_errors).

**Before**
```php
$file = file_get_contents('unknown.txt');
// PHP Warning:  file_get_contents(unknown.txt): failed to open stream: No such file or directory

// workaround:
$file = @file_get_contents('unknown.txt');
if (false === $file) {
    $e = error_get_last();
    throw new \ErrorException($e['message'], 0, $e['type'], $e['file'], $e['line']);
}
```

**After**
```php
$file = ErrorHandler::call('file_get_contents', 'unknown.txt');

// or
$file = ErrorHandler::call(static function () {
    return file_get_contents('unknown.txt');
});

// or (PHP 7.4)
$file = ErrorHandler::call(fn () => file_get_contents('unknown.txt'));
```

All credits to @nicolas-grekas #32936 (comment) and @vudaltsov for the idea.

Commits
-------

0faa855 Added ErrorHandler::call() method utility to turns any PHP warnings into `\ErrorException`

…urns any PHP error into \ErrorException (yceruto)

This PR was merged into the 4.4 branch.

Discussion
----------

[ErrorHandler] Added call() method utility to turns any PHP error into \ErrorException

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#32936
| License       | MIT
| Doc PR        | symfony/symfony-docs#...

**Issue**

There is no easy way to catch PHP warnings, though some progress has been made in this area for PHP 8.0 (https://wiki.php.net/rfc/consistent_type_errors).

**Before**
```php
$file = file_get_contents('unknown.txt');
// PHP Warning:  file_get_contents(unknown.txt): failed to open stream: No such file or directory

// workaround:
$file = @file_get_contents('unknown.txt');
if (false === $file) {
    $e = error_get_last();
    throw new \ErrorException($e['message'], 0, $e['type'], $e['file'], $e['line']);
}
```

**After**
```php
$file = ErrorHandler::call('file_get_contents', 'unknown.txt');

// or
$file = ErrorHandler::call(static function () {
    return file_get_contents('unknown.txt');
});

// or (PHP 7.4)
$file = ErrorHandler::call(fn () => file_get_contents('unknown.txt'));
```

All credits to @nicolas-grekas symfony#32936 (comment) and @vudaltsov for the idea.

Commits
-------

0faa855 Added ErrorHandler::call() method utility to turns any PHP warnings into `\ErrorException`