Simplify push notification flow by using locally stored values for pending pushes (#6258)

* Create `PushRequest` in push history DB: this will be used to store requests for push notifications, either pending or completed ones.

* Rename `WorkManagerRequest` to `WorkManagerRequestBuilder`: make its `build` method return a list of `WorkManagerRequestWrapper`, which can be used to enqueue normal or unique workers.

* Rename `PerformDatabaseVacuumRequestBuilder` and adapt it to the new API.

* Adjust other components using `WorkManagerRequest`.

* Replace `SyncNotificationWorkManagerRequestBuilder` with `SyncPendingNotificationsRequestBuilder` and `FetchNotificationsWorker` with `FetchPendingNotificationsWorker`: this new pair of request builder and worker allow enqueuing requests for a session id and, once the worker runs, retrieve all the pending request data and use it to fetch the associated events. This simplifies quite a bit how this data had to be passed or grouped, since it's no longer necessary to do so

* Add new methods to `PushHistoryService` to modify the `PushDatabase`:

- insertOrUpdatePushRequest
- insertOrUpdatePushRequests
- getPendingPushRequests
- removeOldPushRequests

* Make `PushHandler` just handle incoming pushes: those will be inserted into the pending push request table in DB, then handled by the new worker. Once the process finished, a new `NotificationResultProcessor` will handle the results and what needs to be done with them (call ringing, displaying notifications, etc.)

* Add `requestType` optional parameter to `WorkManagerScheduler.cancel` so we can decide to only cancel some kinds of requests.

* Add migration to remove existing work manager requests for fetching notifications, since the previous worker class no longer exists.

features/logout/impl/src/test/kotlin/io/element/android/features/logout/impl/LogoutPresenterTest.kt

@@ -23,6 +23,7 @@ import io.element.android.libraries.matrix.api.encryption.RecoveryState
 import io.element.android.libraries.matrix.test.AN_EXCEPTION
 import io.element.android.libraries.matrix.test.FakeMatrixClient
 import io.element.android.libraries.matrix.test.encryption.FakeEncryptionService
+import io.element.android.libraries.workmanager.api.WorkManagerRequestType
 import io.element.android.libraries.workmanager.test.FakeWorkManagerScheduler
 import io.element.android.tests.testutils.WarmUpRule
 import io.element.android.tests.testutils.lambda.lambdaRecorder
@@ -149,7 +150,7 @@ class LogoutPresenterTest {
 
     @Test
     fun `present - logout then confirm`() = runTest {
-        val cancelWorkManagerJobsLambda = lambdaRecorder<SessionId, Unit> {}
+        val cancelWorkManagerJobsLambda = lambdaRecorder<SessionId, WorkManagerRequestType?, Unit> { _, _ -> }
         val workManagerScheduler = FakeWorkManagerScheduler(cancelLambda = cancelWorkManagerJobsLambda)
         val presenter = createLogoutPresenter(workManagerScheduler = workManagerScheduler)
         moleculeFlow(RecompositionMode.Immediate) {
@@ -238,7 +239,7 @@ class LogoutPresenterTest {
 internal fun createLogoutPresenter(
     matrixClient: MatrixClient = FakeMatrixClient(),
     encryptionService: EncryptionService = FakeEncryptionService(),
-    workManagerScheduler: FakeWorkManagerScheduler = FakeWorkManagerScheduler(cancelLambda = {}),
+    workManagerScheduler: FakeWorkManagerScheduler = FakeWorkManagerScheduler(cancelLambda = { _, _ -> }),
 ): LogoutPresenter = LogoutPresenter(
     matrixClient = matrixClient,
     encryptionService = encryptionService,