[Misc] Subscription: Saas Scope handling amended

[Pavan-SAP]

Scope handling in the subscription service has been amended to support either .Callback or .mtCallback in the JWT token. This allows most apps to transition easily, as one of these is usually present already.

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud