PHPC-2024: Introduce macros for simpler class declarations (#1959)

* Introduce macro to simplify fetch_object function declarations

* Add macro for zend_class_entry declaration

* Add macro for ce_init declaration

* Extract macro for Z_<ident>_OBJ_P declaration

* Extract macro for Z_OBJ_<ident> declaration

* Introduce macros to generate classes with helpers

* Use static inline in place of zend_always_inline

* Avoid macro definition for BSON regex class due to name conflicts

* Remove trailing semicolons to avoid empty declarations

Author: alcaeus