floatref - when caption is taken on the table element, remove it from the table

this is because Quarto floatref processes the table caption and it needs to be removed from the table element so that it doesn't get inserted twice

(cherry picked from commit 82ac7c2)

crossref - use pandoc.Caption to reset table caption

(cherry picked from commit 9272f7a)

Author: cderv

src/resources/filters/quarto-pre/parsefiguredivs.lua

@@ -267,6 +267,8 @@ function parse_floatreftargets()
           if table.caption.long and next(table.caption.long) then
             found_caption = true
             caption = table.caption.long[1] -- what if there's more than one entry here?
+            -- table caption should be removed from the table as we'll handle it
+            table.caption = pandoc.Caption{}
             return table
           end
         end