package/php: bump version to 8.0.7

Other changes:

  - Remove BR2_PACKAGE_PHP_EXT_JSON as the json extension is now an
    integral part of PHP and is no longer optional. Due to this, it is
    not added to Config.in.legacy.

  - Move BR2_PACKAGE_PHP_EXT_XMLRPC to Config.in.legacy as the extension has
    been removed. See https://wiki.php.net/rfc/unbundle_xmlprc

 for an
    explination.

  - Add a new patch that allows for opcache to cross-compile with PHP8.

  - Explicitly disable opcache-jit when opcache is enabled, as the JIT fails
    to cross-compile.

  - --enable-maintainer-zts is now --enable-zts

Signed-off-by: Adam Duskett <aduskett@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>