46045 Review, test and release update for ActiveCampaign (Forms)

- Update Active Campaign reference to CMS and Forms 15
- Update Client package to use backoffice 15

Author: dtng95

src/Umbraco.Forms.Integrations.Crm.ActiveCampaign/Client/config.outputPath.js

@@ -1 +1 @@
-export const outputPath = 'Debug' !== 'Release' ? '../wwwroot' : '../obj/Debug/net8.0/clientassets'
+export const outputPath = 'Debug' !== 'Release' ? '../wwwroot' : '../obj/Debug/net9.0/clientassets'