Bug 31569: Remove GetImportRecordsRange from import stage

Bug 31569: Remove GetImportRecordsRange from import stage

This patch removes the use of GetimportRecordsRange from the importing
step

To test:
 0 - Apply patch
 1 - Stage a marc file for import
 2 - Add to basket from a staged file
 3 - Select titles to import (don't select all)
 4 - Fill out necessary fields, be sure to select itemtype on items tab
 5 - Import
 6 - Confirm titles successfully added to basket
 7 - Confirm staged import not marked as imported
 8 - Add to basket from same file
 9 - Select rest of titles
10 - Import
11 - Confirm staged file now marked imported

Signed-off-by: Andrew Fuerste-Henry <andrewfh@dubcolib.org>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>