feat(notifications): NotificationsContainer native updates

Use our component instead of atlaskit
Implement redesign
Add unmount animation
Change mount animation from external lib to CSS
Remove @atlaskit/flag
Remove react-transition-group
Add unmount animation on native
Remove AbstractNotification

Replace @atlaskit icons with our own
Convert some files to TS
Remove @atlaskit/icons

* feat(notifications): small ui updates

* feat(notifications): native notifications UI updates

Remove unused icons
Remove fill none from icons
Rename some icons

This is a stop-gap approach to remove the AtlasKit notifications stack.

Instead of using a AK FlagGroup to render our notifications (Flag components)
in, create our own container and use a fake FlagGroupContext provider, which is
what FlagGroup uses to control what flags can be dismissed.

Since we now render all notifications, the web part has been refactored to make
sure all notifications get a timer.

Added animations

Renamed DrawerPortal to JitsiPortal

Redesigned notifications
Changed notification text and icons color and added collared ribbon

Updated participants list to:
- show Moderator label
- show correct status icons (red for force muted)
- show participants in the right order

Updated moderation to:
- show moderation menu at all times
- make moderation options functional

Updated notifications:
- fixed raise hand to show name
- display moderator rights granted

Updated mute/ stop video for all dialogs to include moderation toggles

Added ask to unmute button

Fix comments on ask to unmute

Co-authored-by: robertpin <robert.pin9@gmail.com>