Upgrade apple_support to 2.9.1 and enable Apple CC toolchain

.bazelrc

diff --git a/.bazelrc b/.bazelrc
index bd092a0..3d948dd 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -30,8 +30,6 @@
 build --features=layering_check
 common --enable_platform_specific_config
 
-common --repo_env=BAZEL_NO_APPLE_CPP_TOOLCHAIN=1
-
 
 # Allow building with MSVC, which is being deprecated.
 # See: https://github.com/protocolbuffers/protobuf/issues/20085

MODULE.bazel

diff --git a/MODULE.bazel b/MODULE.bazel
index 1887970..962f5db 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -7,7 +7,7 @@
 bazel_dep(name = "rules_cc", version = "0.2.15")
 bazel_dep(name = "rules_pkg", version = "1.0.1", dev_dependency = True)
 bazel_dep(name = "platforms", version = "1.0.0")
-bazel_dep(name = "apple_support", version = "1.17.1", repo_name = "build_bazel_apple_support")
+bazel_dep(name = "apple_support", version = "2.9.1", repo_name = "build_bazel_apple_support")
 bazel_dep(name = "bazel_skylib", version = "1.7.1")
 
 register_toolchains(