Add Bazel build target for extractor_test.go

Generated by manually applying the output from CI's Gazelle check.
This adds the go_test target for the new extractor_test.go file.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

go/extractor/BUILD.bazel

@@ -1,4 +1,4 @@
-load("@rules_go//go:def.bzl", "go_library")
+load("@rules_go//go:def.bzl", "go_library", "go_test")
 load("@rules_java//java:defs.bzl", "java_library")
 load("@rules_pkg//pkg:mappings.bzl", "pkg_files")
 
@@ -60,3 +60,10 @@ pkg_files(
     },
     visibility = ["//go:__pkg__"],
 )
+
+go_test(
+    name = "extractor_test",
+    srcs = ["extractor_test.go"],
+    embed = [":extractor"],
+    deps = ["@org_golang_x_tools//go/packages"],
+)