Unify functions like parse_copy_file_format_options for insesrt & copy

[everpcpc]

    we can separate copy options and format options in 2 dict.

and reuse fn like

pub fn parse_copy_file_format_options(
    file_format_options: &BTreeMap<String, String>,
) -> Result<FileFormatOptions>

Originally posted by @youngsofun in #9249 (comment)