New room list: reduce padding between avatar and room list border (#29634)

* feat(room list): reduce padding between avatar and room list border

* test(e2e): update screenshots

Author: florianduros

playwright/snapshots/left-panel/room-list-panel/room-list-panel.spec.ts/room-list-panel-linux.png

@@ -27,7 +27,7 @@
     }
 
     .mx_RoomListItemView_container {
-        padding-left: var(--cpd-space-3x);
+        padding-left: var(--cpd-space-2x);
         font: var(--cpd-font-body-md-regular);
         height: 100%;