Integrate OpenSSL libctx to pwhash

[bukka]

This allows using OpenSSL Argon2 password hashing on ZTS.

[petk]

Should this be enabled also on Windows?

--- a/ext/openssl/config.w32
+++ b/ext/openssl/config.w32
@@ -16,9 +16,7 @@ if (PHP_OPENSSL != "no") {
                        AC_DEFINE("LOAD_OPENSSL_LEGACY_PROVIDER", 1, "Define to 1 to load the OpenSSL legacy algorithm provider in addition to the default provider.");
                }
                if (PHP_OPENSSL_ARGON2 != "no") {
-                       if (PHP_ZTS != "no") {
-                               WARNING("OpenSSL argon2 hashing not supported in ZTS mode for now");
-                       } else if (!CHECK_FUNC_IN_HEADER("openssl/thread.h", "OSSL_set_max_threads", PHP_PHP_BUILD + "\\include")) {
+                       if (!CHECK_FUNC_IN_HEADER("openssl/thread.h", "OSSL_set_max_threads", PHP_PHP_BUILD + "\\include")) {
                                WARNING("OpenSSL argon2 hashing requires OpenSSL >= 3.2");
                        } else {
                                AC_DEFINE("HAVE_OPENSSL_ARGON2", 1, "Define to 1 to enable OpenSSL argon2 password hashing.");

[bukka]

Yeah good idea. We should also bump OpenSSL version in 8.5 to 3.5.