Introduce archive_write_open2() with free callback

Introduce archive_write_open2() with free callback

The archive_write_open() function does not provide a free callback.
Freeing was done by the close callback. When the open callback fails,
the client filter is left in ARCHIVE_WRITE_FILTER_STATE_FATAL,
the close callback is not called and unfreed resources may be left behind.

Fixes #1456