Issue: https://github.com/php/php-src/issues/11317
Author: triatic
### Description
The following code:
```php
<?php
$ssh2 = ssh2_connect('example.com');
ssh2_auth_pubkey_file($ssh2, 'ubuntu', 'pubkey', 'privkey');
$sftp = ssh2_sftp($ssh2);
ssh2_sftp_unlink($sftp, 'myfile');
ssh2_scp_send($ssh2, 'myfile', 'myfile');
$myfile = ssh2_sftp_stat($sftp, 'myfile');
if ($myfile['size'] != filesize('myfile')) echo 'File size mismatch, local:
' . filesize('myfile') . ', remote: ' . $myfile['size'] .
"\n";
```
Resulted in this output:
```
File size mismatch, local: 3938770, remote: 2310144
```
But I expected this output instead:
I should get no output as the file sizes on the local and remote servers should match.
ssh2_scp_send() is not sending the whole file to the remote server.
### PHP Version
PHP 8.1.2
### Operating System
_No response_