Move Bean declaration from taskana-rest-spring to taskana-spring

[arolfes]

Currently Spring Beans (of TASKANA Services) are declared in the RestConfiguration, which is within taskana-rest-spring.

This is not ideal since users which only use taskana-spring have to declare the beans manually if they use taskana-spring without taskana-rest-spring. Therefore, we want to move the declaration of beans from taskana-rest-spring to taskana-spring

[arolfes]

Hello @mustaphazorgati , do you think this task is a good issue for Daniel to start learning spring and spring bean handling?

[mustaphazorgati]

Hey @arolfes,

I'll write you on a private channel.