Use launcher stub template from bazel

This was added in bazelbuild/bazel#12994 (and
fixed in bazelbuild/bazel#13790).

This has been included in all Bazel releases since 5.0.0, which is the
minimum supported Bazel version of rules_kotlin according to https://github.com/bazelbuild/rules_kotlin/blob/master/README.md

This prevents having a build-time dependency on access to
raw.githubusercontent.com.

MODULE.bazel

@@ -18,7 +18,6 @@ use_repo(
     "com_github_google_ksp",
     "com_github_jetbrains_kotlin",
     "com_github_pinterest_ktlint",
-    "kt_java_stub_template",
     "rules_android",
 )
 

kotlin/internal/jvm/jvm.bzl

@@ -134,7 +134,7 @@ _implicit_deps = {
     ),
     "_java_stub_template": attr.label(
         cfg = "exec",
-        default = Label("@kt_java_stub_template//file"),
+        default = Label("@bazel_tools//tools/java:java_stub_template.txt"),
     ),
     "_toolchain": attr.label(
         doc = """The Kotlin JVM Runtime. it's only purpose is to enable the Android native rules to discover the Kotlin

src/main/starlark/core/repositories/initialize.release.bzl

@@ -63,15 +63,6 @@ def kotlin_repositories(
         strip_version = ksp_compiler_release.version,
     )
 
-    http_file(
-        name = "kt_java_stub_template",
-        urls = [("https://raw.githubusercontent.com/bazelbuild/bazel/" +
-                 versions.BAZEL_JAVA_LAUNCHER_VERSION +
-                 "/src/main/java/com/google/devtools/build/lib/bazel/rules/java/" +
-                 "java_stub_template.txt")],
-        sha256 = versions.BAZEL_JAVA_LAUNCHER_SHA,
-    )
-
     maybe(
         http_file,
         name = "com_github_pinterest_ktlint",

src/main/starlark/core/repositories/versions.bzl

@@ -53,8 +53,6 @@ versions = struct(
             "https://github.com/bazelbuild/stardoc/releases/download/{version}/stardoc-{version}.tar.gz",
         ],
     ),
-    BAZEL_JAVA_LAUNCHER_VERSION = "6.2.1",
-    BAZEL_JAVA_LAUNCHER_SHA = "78e29525872594ffc783c825f428b3e61d4f3e632f46eaa64f004b2814c4a612",
     PINTEREST_KTLINT = version(
         version = "0.49.1",
         url_templates = [