Call wc_SetSeed_Cb and wolfCrypt_SetPrivateKeyReadEnable_fips in wolfSSL_Init.

Additionally, remove wc_SetSeed_Cb calls applications (e.g. example client and
server), since they are now redundant.

examples/benchmark/tls_bench.c

@@ -1754,9 +1754,6 @@ int bench_tls(void* args)
 
     /* Initialize wolfSSL */
     wolfSSL_Init();
-#ifdef WC_RNG_SEED_CB
-    wc_SetSeed_Cb(wc_GenerateSeed);
-#endif
 
     /* Parse command line arguments */
     while ((ch = mygetopt(argc, argv, "?" "udeil:p:t:vT:sch:P:mS:g")) != -1) {