End to end flow for cloud logs does not seem complete

[ocofaigh]

In https://github.com/terraform-ibm-modules/terraform-ibm-observability-instances/tree/main/modules/cloud_logs the module supports the following:

• instance creation
• cos bucket integration (including auth policy creation)
• event notifications integration (including auth policy creation)

However according to the docs, in order for logs and activity tracker events to be sent to the cloud logs instance, routing needs to be set up.

See:

• Getting started with IBM® Cloud Logs Routing
• Getting started with IBM Cloud Activity Tracker Event Routing

[ocofaigh]

From the docs, to set up routing for logs, we need to:

• set IAM auth policy between ICL Routing and ICL Logs services to allow logs to be sent
• create a tenant (we can use logs-router_tenant for this). As part of this the cloud logs is set up as a target.

[ocofaigh]

Support to create tenants was added in #559