Go: workaround for gazelle on macOS

See https://github.com/bazelbuild/bazel-gazelle/issues/1793 for details.

MODULE.bazel

@@ -56,7 +56,11 @@ node.toolchain(
 use_repo(node, "nodejs", "nodejs_toolchains")
 
 go_sdk = use_extension("@rules_go//go:extensions.bzl", "go_sdk")
-go_sdk.download(version = "1.22.2")
+go_sdk.download(version = "1.22.2")  # default
+
+# following is needed for gazelle on macOS
+# see https://github.com/bazelbuild/bazel-gazelle/issues/1793
+go_sdk.download(version = "1.21.9")
 
 register_toolchains(
     "@nodejs_toolchains//:all",

go/BUILD.bazel

@@ -1,12 +1,25 @@
 load("@bazel_skylib//rules:native_binary.bzl", "native_binary")
 load("@gazelle//:def.bzl", "gazelle")
+load("@rules_go//go:def.bzl", "go_cross_binary")
 load("@rules_pkg//pkg:install.bzl", "pkg_install")
 load("@rules_pkg//pkg:mappings.bzl", "pkg_attributes", "pkg_filegroup", "pkg_files")
 load("//:defs.bzl", "codeql_platform")
 
+# following is needed for running gazelle on macOS
+# see https://github.com/bazelbuild/bazel-gazelle/issues/1793
+go_cross_binary(
+    name = "gazelle-1.21.9",
+    sdk_version = "1.21.9",
+    target = "@gazelle//cmd/gazelle",
+)
+
 gazelle(
     name = "gazelle",
     extra_args = ["go/extractor"],
+    gazelle = select({
+        "@platforms//os:macos": ":gazelle-1.21.9",
+        "//conditions:default": "@gazelle//cmd/gazelle",
+    }),
 )
 
 _gen_binaries = [