fix(pricing, medusa): resolve minor pricing-module bugs (#5685)

* fix region price updates

* pricing migration: include title/name field value migration

* update migration scripts for pricing module

* move file to script utils

* rename file

* rename file

* add changeset

* remove redundant maps

* update migration script

* nit

* remove unnecessary variable

* filter before map

* array function naming cleanup

* chore: address pr reviews

---------

Co-authored-by: Philip Korsholm <philip.korsholm@hotmail.com>
Co-authored-by: Philip Korsholm <88927411+pKorsholm@users.noreply.github.com>

.changeset/angry-ghosts-taste.md

@@ -0,0 +1,7 @@
+---
+"@medusajs/workflows": patch
+"@medusajs/pricing": patch
+"@medusajs/medusa": patch
+---
+
+fix(workflows, pricing, medusa): update region variants fix + pricing module migration scripts