Ps/pm 5965/better config polling (#8325)

* Create tracker that can await until expected observables are received.

* Test dates are almost equal

* Remove unused class method

* Allow for updating active account in accout service fake

* Correct observable tracker behavior

Clarify documentation

* Transition config service to state provider

Updates the config fetching behavior to be lazy and ensure that any emitted value has been updated if older than a configurable value (statically compiled).

If desired, config fetching can be ensured fresh through an async.

* Update calls to config service in DI and bootstrapping

* Migrate account server configs

* Fix global config fetching

* Test migration rollback

* Adhere to implementation naming convention

* Adhere to abstract class naming convention

* Complete config abstraction rename

* Remove unnecessary cli config service

* Fix builds

* Validate observable does not complete

* Use token service to determine authed or unauthed config pull

* Remove superfluous factory config

* Name describe blocks after the thing they test

* Remove implementation documentation

Unfortunately the experience when linking to external documentation is quite poor. Instead of following the link and retrieving docs, you get a link that can be clicked to take you out of context to the docs. No link _does_ retrieve docs, but lacks indication in the implementation that documentation exists at all.

On the balance, removing the link is the better experience.

* Fix storybook

libs/common/spec/observable-tracker.ts

@@ -0,0 +1,86 @@
+import { Observable, Subscription, firstValueFrom, throwError, timeout } from "rxjs";
+
+/** Test class to enable async awaiting of observable emissions */
+export class ObservableTracker<T> {
+  private subscription: Subscription;
+  emissions: T[] = [];
+  constructor(private observable: Observable<T>) {
+    this.emissions = this.trackEmissions(observable);
+  }
+
+  /** Unsubscribes from the observable */
+  unsubscribe() {
+    this.subscription.unsubscribe();
+  }
+
+  /**
+   * Awaits the next emission from the observable, or throws if the timeout is exceeded
+   * @param msTimeout The maximum time to wait for another emission before throwing
+   */
+  async expectEmission(msTimeout = 50) {
+    await firstValueFrom(
+      this.observable.pipe(
+        timeout({
+          first: msTimeout,
+          with: () => throwError(() => new Error("Timeout exceeded waiting for another emission.")),
+        }),
+      ),
+    );
+  }
+
+  /** Awaits until the the total number of emissions observed by this tracker equals or exceeds {@link count}
+   * @param count The number of emissions to wait for
+   */
+  async pauseUntilReceived(count: number, msTimeout = 50): Promise<T[]> {
+    for (let i = 0; i < count - this.emissions.length; i++) {
+      await this.expectEmission(msTimeout);
+    }
+    return this.emissions;
+  }
+
+  private trackEmissions<T>(observable: Observable<T>): T[] {
+    const emissions: T[] = [];
+    this.subscription = observable.subscribe((value) => {
+      switch (value) {
+        case undefined:
+        case null:
+          emissions.push(value);
+          return;
+        default:
+          // process by type
+          break;
+      }
+
+      switch (typeof value) {
+        case "string":
+        case "number":
+        case "boolean":
+          emissions.push(value);
+          break;
+        case "symbol":
+          // Cheating types to make symbols work at all
+          emissions.push(value.toString() as T);
+          break;
+        default: {
+          emissions.push(clone(value));
+        }
+      }
+    });
+    return emissions;
+  }
+}
+function clone(value: any): any {
+  if (global.structuredClone != undefined) {
+    return structuredClone(value);
+  } else {
+    return JSON.parse(JSON.stringify(value));
+  }
+}
+
+/** A test helper that builds an @see{@link ObservableTracker}, which can be used to assert things about the
+ * emissions of the given observable
+ * @param observable The observable to track
+ */
+export function subscribeTo<T>(observable: Observable<T>) {
+  return new ObservableTracker(observable);
+}