AWS audit event shown in Web UI is not accurate

[greedy52]

Current behavior:

1. Web UI presents the event as user has connected to AWS console, which may not be correct. user maybe just using tsh aws
2. Access to AWS Web console through a trusted cluster on WebUI does not leave an audit event on leaf cluster
3. Hashed role session name is not being recorded in audit events.

For #1

For #2, the app session event is only on root

Expected behavior:

1. The app session start can be generic to app access. AWS Web Console can have a separate audit event (similar to App Session Chunk)
2. The Web Console event should be recorded in leaf cluster
3. aws_role_session_name should be added to both AWS Web Console event, and App Session Chunk

Bug details:

• Teleport version: v16
• Recreation steps: root cluster with a long username, access AWS app in leaf cluster through both WebUI and tsh