fix(AccountsController): Use get_all to get payment requests when updating advance payment status

[cogk]

I believe there was a mistake done in #40643, see diff.

frappe.db.count was replaced by frappe.get_list, which does not have the same permission model (unchecked vs checked)

erpnext/erpnext/controllers/accounts_controller.py

Lines 1936 to 1937 in c9c6211

	prs = frappe.db.count(
	"Payment Request",

/cc @blaggacao

[blaggacao]

Yep: #40988 should fix it, too. Either way seems good to me.

Thanks for also trying to fix this, @cogk !