[PM-16793] port credential generator service to providers (#14071)

* introduce extension service
* deprecate legacy forwarder types
* eliminate repeat algorithm emissions
* extend logging to preference management
* align forwarder ids with vendor ids
* fix duplicate policy emissions; debugging required logger enhancements

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Co-authored-by: Daniel James Smith <2670567+djsmith85@users.noreply.github.com>

libs/common/src/tools/rx.rxjs.ts

@@ -0,0 +1,13 @@
+import { Observable } from "rxjs";
+
+/**
+ * Used to infer types from arguments to functions like {@link withLatestReady}.
+ * So that you can have `forkJoin([Observable<A>, PromiseLike<B>]): Observable<[A, B]>`
+ * et al.
+ * @remarks this type definition is derived from rxjs' {@link ObservableInputTuple}.
+ *   The difference is it *only* works with observables, while the rx version works
+ *   with any thing that can become an observable.
+ */
+export type ObservableTuple<T> = {
+  [K in keyof T]: Observable<T[K]>;
+};