Upgrade all components to cds8

[StefanHenke]

This PR fixes test failures of the Bookshop ITests using CAP 3 and cds8.

• authentication.normalize-provider-tenant: true needs to be set in the application.yaml because current itest logic requires the provider tenant to be subscribed. The deployment shell script is setting this value to false using a sed command which requires this property to be available in the file
• hdi-deploy in version 5 does not bundle any hana db client, but comes with a post install script that checks that one client has been installed by an external party. As we don´t need db accesses in the ìnstall-dependenciesgoal inpom.xml, we just set --ignore-scripts`