declare macos_default_link_flags unsupported to avoid linking Foundation

The cc toolchain feature "macos_default_link_flags" for a unix toolchain
adds the linker flag "-fobjc-link-runtime" for backwards compatibility:

https://cs.opensource.google/bazel/bazel/+/refs/tags/7.3.1:tools/cpp/unix_cc_toolchain_config.bzl;l=1412-1427

Some link actions under Bazel 7 fail with the message:

  ld: framework not found Foundation

haskell/cc.bzl

@@ -87,7 +87,10 @@ def cc_interop_info(ctx, override_cc_toolchain = None):
         ctx = real_ctx,
         cc_toolchain = cc_toolchain,
         requested_features = ctx.features,
-        unsupported_features = ctx.disabled_features,
+        # we explicitly declare macos_default_link_flags as unsupported since it will by default add
+        # the linker flag "-fobjc-link-runtime", since it leads to the Foundation framewok being linked on macOS
+        # which leads to: "ld: framework not found Foundation"
+        unsupported_features = ctx.disabled_features + ["macos_default_link_flags"],
     )
     compile_variables = cc_common.create_compile_variables(
         feature_configuration = feature_configuration,