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 commit 7fdac62393ee1e96969cca38a4ce0c07993dce7e) # Conflicts: # erpnext/stock/doctype/delivery_note/test_delivery_note.py * chore: fix conflicts --------- Co-authored-by: rohitwaghchaure <rohitw1991@gmail.com> (cherry picked from commit 4057682c878bd6abffa63e7343ba33bd220bc88c) Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>