mgr/dashboard: upgrade angular to 19

mgr/dashboard: upgrade angular to 19

* bump nodejs to 22.21.1
* remove swagger-ui from the package.json and import the bundled version
  of it which is `swagger-ui-dist`. This removes the dependencies to the
react redux which is bought by the swagger-ui and also reduces the build
assets and build warnings. we really don't need the whole swagger-ui
package to be present here. Also importing the swagger-ui.css inside the
api-docs component lazily.

since our project is now under nx, upgraded using the nx migrate
command. It took care of the changes where it added the `standalone:
false` to all our files since we are still on modular architecture.

Other changes include
- adding `flush()` to fakeAsync mock test
- fixing some complaints raised by tsc linter as per the new typescript
  type checks
- removed `this` from html components
- fixed jest config for newer presets

Signed-off-by: Nizamudeen A <nia@redhat.com>