ext/phar: Avoid repeated strlen() calls in phar_fancy_stat()

[LamentXU123]

This patch removes the temporary key array and uses ZEND_STRL(...) directly for each fixed key instead. This avoid repeated strlen() calls and also reduce code complexity.

[devnexen]

I would say yes even though the benefit is really more the readability improvement more than "saving strlen calls", nowadays strlen(str)/sizeof(str)-1 the former still use __builtin_strlen behind the scene with compile time strings like here.

[LamentXU123]

Test failures are unrelated :/