[GIT-PULLS] [php-src] PR #23080: configure: disable Apple clang size optimizations that hurt runtime speed

Pull Request: https://github.com/php/php-src/pull/23080
Author: staabm

disclaimer: this change was generated by claude opus. I have very little experience with php-src development

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Apple clang enables the AArch64 machine outliner and hot/cold code splitting by default at -O2. Both trade speed for size: the outliner inserts extra bl/ret pairs into hot paths (measured inside the inlined zval destructor loops of zend_array_destroy, among others), and cold-split fragments (4700+ in a default cli build) are compiled for size, which mispredicted branch hints turn into slow hot code.

Disabling both speeds up a CPU-bound static analysis workload (PHPStan analysing its own codebase, no opcache) by ~4% wall time on an Apple M-series machine. The flags are added only when the compiler accepts them (-Werror guards against clang's unknown -m flag warnings), so non-Apple toolchains are unaffected.

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benchmark:

run `/Users/staabm/workspace/php-src/sapi/cli/php bin/phpstan clear-result-cache -q &&  /Users/staabm/workspace/php-src/sapi/cli/php -d memory_limit=450M bin/phpstan -v` after checking out https://github.com/phpstan/phpstan-src/pull/5942 from the git root folder.
(on first time phpstan-src checkout you need `composer install` and `make` to prepare the codebase)

before this PR:
14,47s
14,87s
14,60s

after this PR (3 runs after 2 warmup runs):
13,91s
13,68s
13,86s


on macOS 26.6 (25G72)