Fix Dynamic engine loading so that the call to ENGINE_load_builtin_engines() is performed.

Fixes #11510

PR #11240 Added support for passing the libctx to the config loader.
As part of this work the call to OPENSSL_load_builtin_modules() + ENGINE_load_builtin_engines() was deferred until module_run() is called.
The call to ENGINE_load_builtin_engines() has been added to ENGINE_by_id().
Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NDmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/11543)

crypto/engine/eng_list.c

@@ -282,6 +282,8 @@ ENGINE *ENGINE_by_id(const char *id)
         ENGINEerr(ENGINE_F_ENGINE_BY_ID, ERR_R_PASSED_NULL_PARAMETER);
         return NULL;
     }
+    ENGINE_load_builtin_engines();
+
     if (!RUN_ONCE(&engine_lock_init, do_engine_lock_init)) {
         ENGINEerr(ENGINE_F_ENGINE_BY_ID, ERR_R_MALLOC_FAILURE);
         return NULL;