Rename all ArrayListUnmanaged -> ArrayList

ArrayListAlignedUnmanaged has been deprecated for a while, and I occasionally
replace them, but doing one complete pass gets it done once and for all.

src/telemetry/telemetry.zig

@@ -182,7 +182,7 @@ const MockProvider = struct {
     iid: ?[]const u8,
     run_mode: ?Config.RunMode,
     allocator: Allocator,
-    events: std.ArrayListUnmanaged(Event),
+    events: std.ArrayList(Event),
 
     fn init(app: *App) !@This() {
         return .{