fix build files (#11055)

llama-index-integrations/llms/llama-index-llms-mymagic/BUILD

-python_sources()
-
 poetry_requirements(
     name="poetry",
 )

llama-index-integrations/readers/llama-index-readers-llama-parse/BUILD

-python_sources()
-
 poetry_requirements(
     name="poetry",
 )

llama-index-integrations/vector_stores/llama-index-vector-stores-duckdb/BUILD

-python_sources()
-
 poetry_requirements(
     name="poetry",
 )

llama-index-packs/llama-index-packs-self-discover/BUILD

-python_sources()
-
 poetry_requirements(
     name="poetry",
 )

llama-index-packs/llama-index-packs-subdoc-summary/BUILD

-python_sources()
-
 poetry_requirements(
     name="poetry",
 )