Use root test_deps target from bazel_skylib
Fixing
```
$ bazel build //src/test/java/com/google/devtools/build/lib/query2/cquery:FilesOutputFormatterCallbackTest
INFO: Invocation ID: a90dc4d1-9d48-4164-a9d1-7d82a393fc37
INFO: Options provided by the client:
Inherited 'common' options: --isatty=1 --terminal_columns=170
INFO: Reading rc options for 'build' from /Users/pcloudy/workspace/bazel/.bazelrc:
Inherited 'common' options: --enable_platform_specific_config --check_direct_dependencies=error --downloader_config=bazel_downloader.cfg
INFO: Reading rc options for 'build' from /Users/pcloudy/workspace/bazel/.bazelrc:
'build' options: --java_runtime_version=21 --java_language_version=21 --tool_java_language_version=21 --tool_java_runtime_version=21
INFO: Reading rc options for 'build' from /Users/pcloudy/.bazelrc:
'build' options: --verbose_failures --announce_rc --disk_cache=/tmp/bazel_disk_cache --repository_cache=/tmp/bazel_repository_cache
INFO: Found applicable config definition build:macos in file /Users/pcloudy/workspace/bazel/.bazelrc: --host_macos_minimum_os=10.13 --macos_minimum_os=10.13 --cxxopt=-std=c++17 --host_cxxopt=-std=c++17 --per_file_copt=external/.*@-w --host_per_file_copt=external/.*@-w
DEBUG: /private/var/tmp/_bazel_pcloudy/829441223e9fec5a5a2e3d1dd743fdf0/external/grpc-java+/java_grpc_library.bzl:201:14: Multiple values in 'deps' is deprecated in build_bazel_remote_execution_v2_remote_execution_java_grpc
ERROR: /private/var/tmp/_bazel_pcloudy/829441223e9fec5a5a2e3d1dd743fdf0/external/rules_java+/java/BUILD:78:10: in filegroup rule @@rules_java+//java:for_bazel_tests: Visibility error:
target '@@bazel_skylib+//lib:test_deps' is not visible from
target '@@rules_java+//java:for_bazel_tests'
Recommendation: modify the visibility declaration if you think the dependency is legitimate. For more info see https://bazel.build/concepts/visibility
```
after upgrading bazel_skylib which contains https://github.com/bazelbuild/bazel-skylib/pull/508
diff --git a/java/BUILD b/java/BUILD
index 3162148..452c765 100644
--- a/java/BUILD
+++ b/java/BUILD
@@ -88,7 +88,7 @@
"//java/common:for_bazel_tests",
"//java/private:for_bazel_tests",
"//java/toolchains:for_bazel_tests",
- "@bazel_skylib//lib:test_deps",
+ "@bazel_skylib//:test_deps",
],
visibility = ["//visibility:public"],
)
