Update tls13secretstest to use the new simpler test framework

Reviewed-by: Rich Salz <rsalz@openssl.org>

test/tls13secretstest.c

diff --git a/test/tls13secretstest.c b/test/tls13secretstest.c
index ccb8a12..8734f2a 100644
--- a/test/tls13secretstest.c
+++ b/test/tls13secretstest.c
@@ -12,6 +12,7 @@
 #include "../ssl/ssl_locl.h"
 
 #include "testutil.h"
+#include "test_main.h"
 
 #define IVLEN   12
 #define KEYLEN  16
@@ -342,28 +343,7 @@
     return ret;
 }
 
-int main(int argc, char *argv[])
+void register_tests()
 {
-    BIO *err = NULL;
-    int testresult = 1;
-
-    err = BIO_new_fp(stderr, BIO_NOCLOSE | BIO_FP_TEXT);
-
-    CRYPTO_set_mem_debug(1);
-    CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
-
     ADD_TEST(test_handshake_secrets);
-
-    testresult = run_tests(argv[0]);
-
-#ifndef OPENSSL_NO_CRYPTO_MDEBUG
-    if (CRYPTO_mem_leaks(err) <= 0)
-        testresult = 1;
-#endif
-    BIO_free(err);
-
-    if (!testresult)
-        fprintf(stderr, "PASS\n");
-
-    return testresult;
 }