Pluralise the multi-session remove button and confirmation dialog (#33983)

* Pluralise the multi-session remove button and confirmation dialog

When several sessions are selected in Settings > Sessions, the bulk remove button and its confirmation dialog used the singular "Remove this device" string. The singular "this" misleadingly implied the current device would be removed. Use the existing count-aware settings|sessions|sign_out_n_sessions key, matching the other-sessions menu, so the label reads "Remove N sessions".

Fixes #33812

* Update device-management e2e test for the pluralised remove button

The multi-select remove button now reads "Remove N sessions" instead of "Remove this device", so update the Playwright assertion to match.

* Put "Cancel" before "Remove N sessions" in the bulk session action bar

In the "Other sessions" multi-select action bar, "Remove N sessions" was
rendered before "Cancel", which placed the destructive action on the left.
Swap the two buttons so "Cancel" is on the left and "Remove N sessions" on the
right, per review feedback on #33983.

apps/web/playwright/e2e/settings/device-management.spec.ts

@@ -59,7 +59,7 @@ test.describe("Device manager", () => {
         await filteredDeviceListItems.last().click({ force: true });
 
         // sign out from list selection action buttons
-        await tab.getByRole("button", { name: "Remove this device", exact: true }).click();
+        await tab.getByRole("button", { name: "Remove 2 sessions", exact: true }).click();
         await page.getByRole("dialog").getByTestId("dialog-primary-button").click();
 
         // list updated after sign out