[PHP] Support PHP 8.5

[adamziel]

Motivation for the change, related issues

WIP, no .wasm binaries are shipped with this PR yet

Implementation details

Testing Instructions (or ideally a Blueprint)

[adamziel]

@zaerl it seems like we can't ship OPCache as a static extension starting with PHP 8.5:

https://php.watch/rfcs/make_opcache_required

The current Dockerfile either results in this error when OPCache is enabled:

141.2 wasm-ld: error: duplicate symbol: opcache_module_entry
141.2 >>> defined in ext/opcache/opcache_module.o
141.2 >>> defined in ext/opcache/zend_accelerator_module.o

Or in this one when it's disabled:

114.9 /root/php-src/main/main.c:54:10: fatal error: 'ext/opcache/ZendAccelerator.h' file not found
114.9    54 | #include "ext/opcache/ZendAccelerator.h"
114.9       |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
114.9 1 error generated.
114.9 make: *** [Makefile:2494: main/main.lo] Error 1
114.9 emmake: error: 'make -j1' failed (returned 2)
------

It seems like for 8.5 we just need to accept it's a baked in default extension

[adamziel]

yay! there's some cleanup work to do but we're mostly there

[zaerl]

It seems like for 8.5 we just need to accept it's a baked in default extension

NP with this 👍