New upstream version 8.4.8

.github/actions/freebsd/action.yml

.github/workflows/nightly.yml

.github/workflows/root.yml

EXTENSIONS

NEWS

Zend/Optimizer/zend_optimizer.c

Zend/tests/gh18572.phpt

Zend/tests/gh418106144.phpt

Zend/tests/oss_fuzz_417078295.phpt

Zend/zend.h

Zend/zend_ast.c

Zend/zend_inheritance.c

Zend/zend_object_handlers.c

Zend/zend_vm_def.h

Zend/zend_vm_execute.h

build/gen_stub.php

configure

configure.ac

ext/curl/interface.c

ext/curl/tests/gh18458.phpt