Remove Latin-1 workaround on Bazel 6.4.0+

The fix for Latin-1 encoded files was landed in [6.4.0] after
being landed on Bazel [master].

We can conditionally use the old, unhermetic, `tar` workaround
on modern Bazel versions.

[master]: bazelbuild/bazel#18448
[6.4.0]: bazelbuild/bazel#19765

go/private/sdk.bzl

@@ -16,6 +16,7 @@ load("//go/private:common.bzl", "executable_path")
 load("//go/private:nogo.bzl", "go_register_nogo")
 load("//go/private/skylib/lib:versions.bzl", "versions")
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "patch", "read_user_netrc", "use_netrc")
+load("@io_bazel_rules_go_bazel_features//features.bzl", "bazel_features")
 
 MIN_SUPPORTED_VERSION = (1, 14, 0)
 
@@ -434,14 +435,22 @@ def _remote_sdk(ctx, urls, strip_prefix, sha256):
     # Docker on macOS with a bind mount).
     #
     # For .tar.gz files (available for most platforms), we work around this bug
-    # by using the system tar instead of ctx.download_and_extract.
+    # by using the system tar instead of ctx.download_and_extract. We could make
+    # this hermetic by using `@ape-tar//:entrypoint`/`@ape-gzip//:entrypoint`.
     #
     # For .zip files, we use ctx.download_and_extract but with rename_files,
     # changing certain paths that trigger the bug. This is only available
     # in Bazel 6.0.0+ (bazelbuild/bazel#16052). The only situation where
     # .zip files are needed seems to be a macOS host using a Windows toolchain
     # for remote execution.
-    if urls[0].endswith(".tar.gz"):
+    if io_bazel_rules_go_bazel_features.external_deps.extract_supports_unicode_filenames:
+        ctx.download_and_extract(
+            url = urls,
+            stripPrefix = strip_prefix,
+            sha256 = sha256,
+            auth = auth,
+        )
+    elif urls[0].endswith(".tar.gz"):
         if strip_prefix != "go":
             fail("strip_prefix not supported")
         ctx.download(
@@ -470,12 +479,7 @@ def _remote_sdk(ctx, urls, strip_prefix, sha256):
             auth = auth,
         )
     else:
-        ctx.download_and_extract(
-            url = urls,
-            stripPrefix = strip_prefix,
-            sha256 = sha256,
-            auth = auth,
-        )
+        fail("No supported workaround for extracting Go SDK non-ASCII filenames. More recent versions of Bazel have correct support for unpacking the Go SDK.")
 
 def _local_sdk(ctx, path):
     for entry in ctx.path(path).readdir():