update import/export for attachments and new file paths (#22915)

* update import/export for attachments and new file paths

* add unit test

* update templates test

* temp checking

* cleanup

* cleanup

* more cleanup

* lint fixes

* cleanup some functions

* cleanup

* fix build breaks

* fix tests for changes

* move function to different file

* more cleanup, code movement

* unit test fixes

* add unit tests

* fix tests

* more unit test fixes

* test fix

* revert package-lock.json

* fixes from code review

* fix export image

* more fixes to remove attachmentId

* change from removed api

* update test

* lint fixes

* update for review comments

* fix tests

* test fix

* lint fix

* remove sprintf from logging, use mlog

* more lint fixes

* Update server/boards/app/files.go

Co-authored-by: Doug Lauder <wiggin77@warpmail.net>

* remove code

---------

Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: Doug Lauder <wiggin77@warpmail.net>

server/boards/api/blocks.go

@@ -304,7 +304,7 @@ func (a *API) handlePostBlocks(w http.ResponseWriter, r *http.Request) {
 	// this query param exists when creating template from board, or board from template
 	sourceBoardID := r.URL.Query().Get("sourceBoardID")
 	if sourceBoardID != "" {
-		if updateFileIDsErr := a.app.CopyCardFiles(sourceBoardID, blocks); updateFileIDsErr != nil {
+		if updateFileIDsErr := a.app.CopyAndUpdateCardFiles(sourceBoardID, userID, blocks, false); updateFileIDsErr != nil {
 			a.errorResponse(w, r, updateFileIDsErr)
 			return
 		}