Allow empty glob in src/main/starlark/BUILD.release.bazel for Bazel 8 compatibility (#1283)

* Fixes for Windows issues found in the course of bazel-contrib/rules_jvm_external#1297: 1) Use platform-specific path separators. 2) Add Kotlin standard library jars to the data of tools so that the Windows Java launcher can find them in the runfiles manifest.

* Test using path instead of short_path

* Run buildifier

* Consolidate KOTLIN_STDLIBS to //kotlin/compiler:compiler.bzl

* Allow empty glob in src/main/starlark/BUILD.release.bazel for Bazel 8 compatibility

* run buildifier

Author: ahumesky

src/main/starlark/BUILD.release.bazel

@@ -16,7 +16,10 @@ load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
 
 bzl_library(
     name = "starlark",
-    srcs = glob(["*.bzl"]),
+    srcs = glob(
+        ["*.bzl"],
+        allow_empty = True,
+    ),
     visibility = ["//visibility:public"],
     deps = [
         "//src/main/starlark/core",