We should upgrade all our Angular dependencies to v18.
Buildable version was made here, but som tests are failing, and any changes have not been thoroughly considered: https://github.com/kirbydesign/designsystem/pull/3503.
In addition, Ionic upgrade (#3548) should be done before this to be fully compatible with Angular 18.
Describe the housekeeping request
We should upgrade all our Angular dependencies to v18. Buildable version was made here, but som tests are failing, and any changes have not been thoroughly considered: https://github.com/kirbydesign/designsystem/pull/3503. In addition, Ionic upgrade (#3548) should be done before this to be fully compatible with Angular 18.