Enhance the attachment macro to allow authors to exclude or include specific columns from output

The attachments macro should allow authors to specify exclusion or inclusion of specific columns in the resulting output. In my current use-case I'd like to be able to remove the "comments" and "creator" fields from certain

macros. I believe other users will likely have use cases for exclusion of the size or creation date. There may also be a use case for allowing authors to specify inclusion of the LASTMODDATE value in the output.

This probably relates to CONF-22002, especially if CONF-22002 will allow for attachment lists to be sized as small as possible for the text to fit.