[Migration] Add tables related to notification templates & migrate data from registry

[darshanasbg]

With the introduction [1], email/sms templates will be stored in dedicated tables (instead of registry). Thus its required to create following three tables as a prerequisite to onboard this new capability.

IDN_NOTIFICATION_TYPE
IDN_NOTIFICATION_ORG_TEMPLATE
IDN_NOTIFICATION_APP_TEMPLATE

Refer [2] & [3] on adding above tables to default db scripts.

Also, when migrating from an old version (7.0.0 or lower), its better to migrate existing email/sms templates from registry to database for better performance.

• [1] Carbon registry usage removal from the Email/SMS templates #19999
• [2] Add sql scripts for notification template management carbon-identity-framework#5620
• [3] Rename notification table names for better grouping carbon-identity-framework#5631