fix: incoming rate for sales return with Moving Average valuation method (backport #38849) (#38863) * fix: incoming rate for sales return with Moving Average valuation method (#38849) (cherry picked from commit7fdac62393) # Conflicts: # erpnext/stock/doctype/delivery_note/test_delivery_note.py * chore: fix conflicts --------- Co-authored-by: rohitwaghchaure <rohitw1991@gmail.com> (cherry picked from commit4057682c87) Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>