Add ngx-php to opcache supported sapis (php#11013)

This SAPI embed PHP in Nginx server.
https://github.com/rryqszq4/ngx-php

And in the Techempower benchmarks, it's the fastest PHP SAPI.
https://www.techempower.com/benchmarks/#section=data-r20

Author: joanhey

ext/opcache/ZendAccelerator.c

@@ -2828,6 +2828,7 @@ static inline zend_result accel_find_sapi(void)
 		"uwsgi",
 		"fuzzer",
 		"frankenphp",
+		"ngx-php",
 		NULL
 	};
 	const char **sapi_name;