Register config_hash_test.go in BUILD.bazel

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: gabedos

comp/core/config/BUILD.bazel

@@ -42,6 +42,7 @@ go_library(
 dd_agent_go_test(
     name = "config_test",
     srcs = [
+        "config_hash_test.go",
         "config_test.go",
         "params_test.go",
     ],