[STRICT TS] Migrate platform abstract services functions (#8527)

We currently use a callback syntax for abstract services. This syntax isn't completely strict compliant and will fail the strictPropertyInitialization check. We also currently don't get any compile time errors if we forget to implement a function.

To that end this PR updates all platform owned services to use the appropriate abstract keyword for non implemented functions. I also updated the fields to be actual functions and not properties.

libs/common/src/platform/state/derived-state.provider.ts

@@ -17,9 +17,9 @@ export abstract class DerivedStateProvider {
    * well as some memory persistent information.
    * @param dependencies The dependencies of the derive function
    */
-  get: <TFrom, TTo, TDeps extends DerivedStateDependencies>(
+  abstract get<TFrom, TTo, TDeps extends DerivedStateDependencies>(
     parentState$: Observable<TFrom>,
     deriveDefinition: DeriveDefinition<TFrom, TTo, TDeps>,
     dependencies: TDeps,
-  ) => DerivedState<TTo>;
+  ): DerivedState<TTo>;
 }