Fixing security relevant dependencies

[niclasheun]

Changes

This PR shall fix the outdated dependencies, that might cause a security concern.

Changes on Client side

I fixed all issues that where found by yarn npm audit. I issue remains unsolved (-> see below).

Changes on Server Side

• updated jgit
• updated spring boot version to 3.2.11
• added the whitesource config file (copied from Artemis and adjusted to fit the Prompt project setup)

How the changes where tested

I tested all dependency changes locally and manually tested if Prompt still works correctly (due to the non existence of automated tests).

Issues / Open Questions

• @Mtze Mend/Whitesource runner needs to be added to this repo (to check for potential additional issues)
• On the client side, the react-beautiful-dnd warning is still unresolved.
  This plugin is used in two places:
  -- The course phase manager, which is a currently unused feature
  -- The post kickoff submission form, which we plan to not use any more (since till then we want to have introduced Prompt 2.0).
  Hence, I am not sure if we need to really address this deprecated warning.