remove buck cache and metadata when ./installaton.sh --clean (#12830)

Summary:
as title

Rollback Plan:

Differential Revision: D78842886

Co-authored-by: Gasoonjia <[email protected]>

Author: pytorchbot

install_executorch.py

@@ -50,6 +50,10 @@ def clean():
     print("Cleaning buck-out/...")
     shutil.rmtree("buck-out/", ignore_errors=True)
 
+    # Removes all buck cached state and metadata
+    print("Cleaning buck cached state and metadata ...")
+    shutil.rmtree(os.path.expanduser("~/.buck/buckd"), ignore_errors=True)
+
     # Clean ccache if available
     try:
         result = subprocess.run(["ccache", "--version"], capture_output=True, text=True)