Auth Guard error when providing authpipe direct rather than as pipe generator (v9 new API not compat)

### Version info

**Angular:** 14

**Firebase:** 9

**AngularFire:** ^7.4.1

**Other (e.g. Ionic/Cordova, Node, browser, operating system):**
Node, Firefox/Chrome, Windows

### How to reproduce these conditions

I've created stackoverflow Q&A of the issue https://stackoverflow.com/questions/73799781/how-to-create-auth-guard-in-angular-fire-v9-with-new-api-not-compat
I believe this is a bug and not a documentation issue given the naming of `authGuardPipe`

When using guard below and navigating to a guarded feature as a user with email not verified (used emulators) this throws the error `TypeError: Unable to lift unknown Observable type` triggered by https://github.com/angular/angularfire/blame/master/src/auth-guard/auth-guard.ts#L21

```
const redirectUnauthorizedAndUnverifiedToAuth: AuthPipe = map((user: User | null) => {
// if not logged in, redirect to `auth`
// if logged in and email verified, allow redirect
// if logged in and email not verified, redirect to `auth/verify`
return !!user ? (user.emailVerified ? true : ['auth', 'verify']) : ['auth']
})
```
Replacing `redirectUnauthorizedAndUnverifiedToAuth` in `data : { authGuardPipe: redirectUnauthorizedAndUnverifiedToAuth }` with `authPipeGenerator` fixes

**Failing test unit, Stackblitz demonstrating the problem**

Can't produce stackblitz due to error https://github.com/stackblitz/core/issues/2039

**Steps to set up and reproduce**

Created basic auth & my-feature modules, v9 new API angular imports

```
...
import { initializeApp, provideFirebaseApp } from '@angular/fire/app';
import { provideAuth, getAuth, connectAuthEmulator } from '@angular/fire/auth';
import {
provideFirestore,
getFirestore,
connectFirestoreEmulator,
} from '@angular/fire/firestore';
import { AppRoutingModule } from './app-routing.module';

@NgModule({
imports: [
BrowserModule,
FormsModule,
AppRoutingModule,
provideFirebaseApp(() => initializeApp(firebase)), <--- provide firebase
provideAuth(() => {
const auth = getAuth();
// connectAuthEmulator(auth, 'http://localhost:9099')
return auth;
}),
provideFirestore(() => {
const firestore = getFirestore();
// connectFirestoreEmulator(firestore, 'localhost', 8080)
return firestore;
}),
],
declarations: [AppComponent, HelloComponent],
bootstrap: [AppComponent],
})
export class AppModule {}
```

app-routing.module.ts
```
import { NgModule } from '@angular/core';
import { User } from '@angular/fire/auth';
import { AuthGuard, AuthPipe, AuthPipeGenerator } from '@angular/fire/auth-guard';
import { Routes, RouterModule } from '@angular/router';
import { map } from 'rxjs';

const redirectUnauthorizedAndUnverifiedToAuth: AuthPipe = map((user: User | null) => {
// if not logged in, redirect to `auth`
// if logged in and email verified, allow redirect
// if logged in and email not verified, redirect to `auth/verify`
return !!user ? (user.emailVerified ? true : ['auth', 'verify']) : ['auth']
})
const authPipeGenerator: AuthPipeGenerator = () => redirectUnauthorizedAndUnverifiedToAuth

const routes: Routes = [
{
path: "auth",
loadChildren: () => import("./auth/auth.module").then(m => m.AuthModule)
},
{
path: "my-feature",
loadChildren: () => import("./my-feature/my-feature.module").then(m => m.MyFeatureModule),
canActivate: [AuthGuard],
data: { authGuardPipe: redirectUnauthorizedAndUnverifiedToAuth }
},
{ path: "", redirectTo: "auth", pathMatch: "full" },
{ path: "**", redirectTo: "auth" }
];

@NgModule({
imports: [RouterModule.forRoot(routes)],
exports: [RouterModule]
})
export class AppRoutingModule { }
```

### Expected behavior

if you provide pipe this should work esp. given the name `authGuardPipe`
```
{
path: "my-feature",
loadChildren: () => import("./my-feature/my-feature.module").then(m => m.MyFeatureModule),
canActivate: [AuthGuard],
data: { authGuardPipe: redirectUnauthorizedAndUnverifiedToAuth }
},
```

### Actual behavior

Error `TypeError: Unable to lift unknown Observable type`

從觸發錯誤的那一行開始查看 src/auth-guard/auth-guard.ts，然後使用 issue 中展示的 AngularFire v9 API，透過 authGuardPipe 重現路由設定。當直接使用 AuthPipe 時不再出現「Unable to lift unknown Observable type」，同時現有的 auth guard 行為仍如描述般重新導向未驗證身分和未完成驗證的使用者時，即表示完成。

由索引模型根據 Issue 內容生成。