Updated type hinting to only hint function parameters and return values by @dlyons request

build/recipes/build_pkgs/build_pkgs.py

build/recipes/build_pkgs/test/conftest.py

build/recipes/build_pkgs/test/test_build_pkgs.py

build/recipes/setup_to_meta/setup_to_meta.py

build/recipes/setup_to_meta/test/conftest.py

build/recipes/setup_to_meta/test/test_setup_to_meta.py

build/recipes/test_recipes/test/test_test_recipes.py

build/recipes/test_recipes/test_recipes.py

build/tools/parse_setup.py

build/tools/transfer_to_builder.py