fix: Missing commits from hotfix branch (#17997)

* fix: merge conflict

* fix: restored missing set_gst_state_and_state_number function

* fix: style linting as per codacy

* fix: Fixes related to customer/lead merging

* fix: merge conflict

* fix: Fixes related to customer/lead merging

* fix: Assign isue/opportunity to user

* fix: Assign isue/opportunity to user

* fix: Replaced Invoice type by GST Category

* fix: merge conflict

* fix: merge conflict

* fix: test cases

* fix: test cases
diff --git a/erpnext/regional/italy/e-invoice.xml b/erpnext/regional/italy/e-invoice.xml
index b725b96..9a588d1 100644
--- a/erpnext/regional/italy/e-invoice.xml
+++ b/erpnext/regional/italy/e-invoice.xml
@@ -118,7 +118,7 @@
     <DatiGenerali>
       <DatiGeneraliDocumento>
         <TipoDocumento>{{ doc.type_of_document }}</TipoDocumento>
-        <Divisa>EUR</Divisa>
+        <Divisa>{{ doc.currency }}</Divisa>
         <Data>{{ doc.posting_date }}</Data>
         <Numero>{{ doc.unamended_name }}</Numero>
         {%- if doc.stamp_duty %}