fix: delete BUILD et al files from pypi sourced dependencies

Author: rickeylev

python/private/pypi/whl_library.bzl

@@ -471,8 +471,26 @@ def _whl_library_impl(rctx):
             ],
         )
 
-    rctx.file("BUILD.bazel", build_file_contents)
+    # Delete these in case the wheel had them. They generally don't cause
+    # a problem, but let's avoid the chance of that happening.
+    rctx.file("WORKSPACE")
+    rctx.file("WORKSPACE.bazel")
+    rctx.file("MODULE.bazel")
+    rctx.file("REPO.bazel")
+
+    paths = [rctx.path(".").readdir()]
+    for _ in range(10000000):
+        if not paths:
+            break
+        path = paths.pop()
+
+        # BUILD files interfere with globbing and Bazel package boundaries.
+        if path.basename in ("BUILD", "BUILD.bazel"):
+            rctx.delete(path)
+        elif path.is_dir:
+            paths.extend(path.readdir())
 
+    rctx.file("BUILD.bazel", build_file_contents)
     return
 
 def _generate_entry_point_contents(