test_allocator: Add needed base/config dependency.

These headers are included, but the dependency was missing.

PiperOrigin-RevId: 971979202
Change-Id: Id3594929f03d544ab8cb05d376dee1bc3be763ba

absl/container/BUILD.bazel

diff --git a/absl/container/BUILD.bazel b/absl/container/BUILD.bazel
index 4b8db22..c8eba69 100644
--- a/absl/container/BUILD.bazel
+++ b/absl/container/BUILD.bazel
@@ -169,6 +169,9 @@
     linkopts = ABSL_DEFAULT_LINKOPTS,
     textual_hdrs = ["internal/test_allocator.h"],
     visibility = ["//visibility:private"],
+    deps = [
+        "//absl/base:config",
+    ],
 )
 
 cc_test(