Fix test dependencies for in-tree build

When the plugin is included in-tree the tests fail to build with:

 "Using type ... from an indirect dependency"

Add the necessary explicit dependencies to fix this.

Bug: Issue 10474
Change-Id: I65f9b02aa9d3a3bd47c001640e0bf8984f2a71a6
diff --git a/BUILD b/BUILD
index 98aa1c2..900a009 100644
--- a/BUILD
+++ b/BUILD
@@ -1,6 +1,7 @@
 load("//tools/bzl:junit.bzl", "junit_tests")
 load(
     "//tools/bzl:plugin.bzl",
+    "PLUGIN_DEPS",
     "PLUGIN_TEST_DEPS",
     "gerrit_plugin",
 )
@@ -81,7 +82,7 @@
     name = "gc-conductor__plugin_test_deps",
     testonly = 1,
     visibility = ["//visibility:public"],
-    exports = EXECUTOR_DEPS + PLUGIN_TEST_DEPS + [
+    exports = EXECUTOR_DEPS + PLUGIN_DEPS + PLUGIN_TEST_DEPS + [
         ":gc-conductor__plugin",
         ":gc-executor_lib",
         "@byte-buddy//jar",