Aled James

Add first proposal for architecture diagrams

2

**What this PR does / why we need it**: Fixes #405 **Special notes for your reviewer**: Discussed in Tarmak meeting that it would be good to have what we have...

/kind bug **What happened**: In a multi-cluster environment, error occurred when applying a new cluster: ``` DEBU[0073] Error: Error applying plan: app=tarmak module=terraform std=err DEBU[0073] app=tarmak module=terraform std=err DEBU[0073] 1...