Add stream context metadata options for compress.zlib:// protocol wrapper so that original mtime and name can be given

Description

Currently, when writing to a gz file using the compress.zlib:// protocol wrapper it is not possible to pass the mtime or name of the original file. It would be nice if we could do so without having to reopen the gzip file in write mode for write the metadata directly into it as in this bug report https://bugs.php.net/bug.php?id=46577
I believe that this can be done by adding new stream context options for zlib (similar to those for phar). See https://www.php.net/manual/en/context.php

The gzip file format supports the following meta data:

• compression method
• itype (text or binary)
• mtime (nice to have)
• size (thankfully set by compress.zlib:// )
• os
• original file name (nice to have)
• comment

Comienza inspeccionando el contenedor del protocolo compress.zlib:// y cómo gestiona sus opciones de contexto del flujo; después compara las opciones de contexto de phar existentes mencionadas en el issue. Determina cómo deben pasarse mtime y el nombre de archivo original a los metadatos de gzip, y verifica que la escritura a través del contenedor conserve ambos valores sin volver a abrir el archivo.