[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