AWS OIDC Integration Dashboard

[marcoandredinis]

We should give the user the visibility and management tools, so they can understand the current status and fix/change any configuration related to the Integration.
The following components must be part of this dashboard.

AWS App Access

Whether the AWS App Access is enabled for the integration.
Users should be able to enable or disable the AWS App.
Enabling it will redirect them to the Discover flow.

RDS, EC2 and EKS

RDS databases, EC2 instances and EKS clusters can be enrolled and accessed from teleport.

Enrollment is done by creating a new DiscoveryConfig associated with an existing DiscoveryService's DiscoveryGroup (self-hosted users must manage their own DiscoveryService).
The dashboard must show the DiscoveryConfig rules created for each type of resource.

For RDS, the flow deploys a Database Service in user's AWS Account using Amazon ECS.
Users should see how many database agents deployed in ECS exist (name, teleport version, config, ...).

_{Listing ECS Services requires a region. In order to get the region we'll use two sources: a) regions in use by the DiscoveryConfig rules; b) regions in use by the onboarded RDS databases}

Tasks

Tasks will allow users to see which resources failed to enroll.
When opening the Integration, users should see how many tasks exists and possibly open the Tasks view.

Dashboard

Beta Give feedback

1. AWS OIDC: Remove App Server that uses the integration credentials #42012
   backport/branch/v15 backport/branch/v16 no-changelog size/sm +4
2. Discovery Config Status: allow for other Fetchers to contribute to the global Status #43861
   backport/branch/v16 discovery no-changelog size/sm +4
3. Add DiscoveryConfigStatus field for AWS EC2 Resources #43862
   backport/branch/v16 no-changelog size/sm +3
4. Revert "Add DiscoveryConfigStatus field for AWS EC2 Resources (#43862)" #44540
   no-changelog size/sm +2
5. Add DiscoveryConfigStatus AWS EC2 resource counters (proto) #45553
   backport/branch/v16 discover no-changelog size/sm +4
6. DiscoveryConfigStatus: summary for AWS EC2 instances found #45637
   backport/branch/v16 discover discovery no-changelog size/md +5
7. DiscoveryConfigStatus: summary for AWS RDS databases found
8. DiscoveryConfigStatus: summary for AWS EKS clusters found
9. Endpoint that returns a list of DiscoveryConfig matchers from all the DiscoveryConfigs, filtered by integration.

Tasks

Beta Give feedback

1. Add User Tasks resource - protos #46059
   backport/branch/v16 no-changelog size/md +3
2. User Tasks: services and clients implementation #46131
   backport/branch/v16 no-changelog size/xl tctl +4
3. Create User Task when EC2 Auto Discover fails #46134
   backport/branch/v16 no-changelog +2
4. Emit notification stating how many tasks were emitted above
5. Emit Audit Events for User Integration Tasks
6. WebAPI: User Task CRUD (list by integration and list by integration/tasktype)
7. Create User Task for: missing policies, missing ssm document,