[APIM-IS-KM] Add system property to avoid allowlisting apim rest api scopes

[chashikajw]

Purpose

This PR will add a system property to avoid allowlisting APIM rest apis scopes in apim km connector in iskm setup.
If someone needs to restrict allowlisting APIM rest apis scopes, he needs to define the following 2 system properties as true.
Sytem properties:
restrict.apim.restapi.scopes=true
restrict.unassigned.scopes=true

Startup:

./wso2server.sh -Drestrict.unassigned.scopes=true -Drestrict.unassigned.scopes=true

Fixes

• Non-Admin users can get unauthorised scopes from KM wso2/api-manager#2363

[Thumimku]

Hi @chashikajw,

⚠️ Notice: This PR has been open for a while. To keep the repository clean and up-to-date, this PR will be closed within the next two weeks if there is no further activity.

Please take one of the following actions:

• Merge the PR if it is ready.
• Close the PR if it is no longer relevant.
• Leave a comment explaining why it should remain open and provide an update on its progress.

Your prompt attention to this matter is greatly appreciated. Thank you for your understanding and collaboration! 🙏