Fix admin role creation issues and returning everyone role for every user in SCIM response

[AnuradhaSK]

• Fix Getting following error during server startup when legacy runtime is enabled.

[2023-10-27 15:33:01,940] [] ERROR {org.wso2.carbon.identity.scim2.common.utils.AdminAttributeUtil} - Error occurred while updating the admin groups's attributes in Tenant ID : -1234, Error : Error retrieving group information from SCIM Tables for tenant ID: -1234 org.wso2.carbon.user.core.UserStoreException: Error retrieving group information from SCIM Tables for tenant ID: -1234
    at org.wso2.carbon.identity.scim2.common.utils.AdminAttributeUtil.updateAdminGroup(AdminAttributeUtil.java:156)
    at org.wso2.carbon.identity.scim2.common.internal.SCIMCommonComponent.activate(SCIMCommonComponent.java:126)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

...

• Fix issue of inability to assign a user to admin role when legacy runtime is disabled; Unable to assign admin role to a user while creating the user wso2/product-is#17286
• Return everyone role for scim users in new authz runtime

Part of wso2/product-is#16363