Function set_column_fulltext_options 

fn set_column_fulltext_options(
    column_schema: &mut ColumnSchema,
    column_name: &str,
    options: &FulltextOptions,
    current_options: Option<FulltextOptions>,
) -> Result<()>

Set column fulltext options if it passed the validation.

Options allowed to modify:

• backend

Options not allowed to modify:

• analyzer
• case_sensitive