[GIT-PULLS] [php-src] PR #23054: Fix GH-22206: avoid musttail in zend_runtime_jit() in the tail-call VM

Pull Request: https://github.com/php/php-src/pull/23054
Author: lazerg

With `--disable-gcc-global-regs` and a compiler that supports `preserve_none`, opcache is built with `ZEND_VM_KIND_TAILCALL`, where `ZEND_OPCODE_RETURN()` expands to a guaranteed tail call. `zend_runtime_jit()` does its work inside `zend_try()`, which uses `setjmp()`, and GCC 16 rejects that combination with "cannot tail-call: caller uses setjmp".

GH-22320 fixed the `--enable-gcc-global-regs` side of the same report. Here the tail call isn't needed: `zend_runtime_jit()` is a cold one-shot JIT trigger rather than a hot VM handler, so a plain call works and the returned opline still goes back to the VM loop as before.

Checked with GCC 16.1.0: a `--disable-gcc-global-regs` build fails on `ext/opcache/jit/zend_jit.lo` before the change and compiles after it. ext/opcache and Zend tests pass on a tail-call VM build.

Fixes GH-22206