Separate alert message for Custom Alerts screen

[AltamashShaikh]

Description

Separate alert message for Custom Alerts screen

Issue No

PG-5045

Steps to Replicate the Issue

Checklist

• [✔] Tested locally or on demo2/demo3?
• [✔] New test case added/updated?
• [✔] Are all newly added texts included via translation?
• [✔] Are text sanitized properly? (Eg use of v-text v/s v-html for vue)
• [/NA] Version bumped?
• [NA] I have understood, reviewed, and tested all AI outputs before use
• [NA] All AI instructions respect security, IP, and privacy rules