Fix undefined fht_float in Apple OS (pytorch#10280)

Summary:

Fix undefined fht_float in Apple OS

- Added the lib source file for default OS
- Other changes are auto-gen by the linter

```
source ~/.bashrc
cd ~/fbsource/fbcode/executorch
conda activate executorch
lintrunner -a
```

Differential Revision: D73213645

Author: Di Xu (SWE)

extension/llm/custom_ops/spinquant/third-party/FFHT/targets.bzl

@@ -16,7 +16,7 @@ def define_common_targets():
     runtime.cxx_library(
         name = "fht",
         srcs = select({
-            "DEFAULT": [],
+            "DEFAULT": ["fht_avx.c"],
             "ovr_config//cpu:arm64": ["fht_neon.c"],
             "ovr_config//cpu:x86_64": ["fht_avx.c"],
         }),