### Summary

Add type hints to `ansible.parsing.dataloader::DataLoader`

### Issue Type

Feature Idea

### Component Name

lib/ansible/parsing/dataloader.py
"""
        If the file is vault encrypted return a path to a temporary decrypted file
        If the file is not encrypted then the path is returned
        Temporary files are cleanup in the destructor
        """
        if not file_path or not isinstance(file_path, (binary_type, text_type)):
            raise AnsibleParserError("Invalid filename: '%s'" % to_native(file_path))
        b_file_path = to_bytes(file_path, errors='surrogate_or_strict')
        if not self.path_exists(b_file_path) or not self.is_file(b_file_path):
            raise AnsibleFileNotFound(file_name=file_path)
        real_path = self.path_dwim(file_path)
        try:
            if decrypt:
                with open(to_bytes(real_path), 'rb') as f:
                    
                    
                    
                    if is_encrypted_file(f, count=len(b_HEADER)):