SDAP: use DEBUG_CONDITIONAL in hot path

Both `perf` and manual measurement confirms ~6..8% perf gain
in the test case:
 - INITGROUPS lookup for a user that is a member of 5k groups,
   no groups were cached;
 - debug_level = 3
 - debug_microseconds = true

Note `debug_microseconds = true` - without this setting impact isn't
that dramatic.

Author: alexey-tikhonov

src/providers/ldap/sdap.c

@@ -1841,7 +1841,7 @@ errno_t sdap_get_primary_name(const char *attr_name,
     }
     talloc_free(tmp_ctx);
 
-    DEBUG(SSSDBG_TRACE_FUNC, "Processing object %s\n", orig_name);
+    DEBUG_CONDITIONAL(SSSDBG_TRACE_FUNC, "Processing object %s\n", orig_name);
 
     *_primary_name = orig_name;