OSM CLI: provide a way to toggle ConfigMap permissive_traffic_policy_mode true/false

[draychev]

At the moment one has to know how to switch from permissive trafic policy mode to observing SMI and back.
This happens via the osm-config ConfigMap -- setting the permissive_traffic_policy_mode key to true or false and reapplying - example.

It would be great to implement this functionality in the OSM CLI so that one colud easily issue a command to a) check the current mode of the service mesh and b) change it

Also - the following Issue will document all ConfigMap values and what they do: #1842
Once we implement a CLI command to change config map values we should add it to the outcome of #1842

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Scope (please mark with X where applicable)

• New Functionality [X]
• Install [ ]
• SMI Traffic Access Policy [ ]
• SMI Traffic Specs Policy [ ]
• SMI Traffic Split Policy [ ]
• Permissive Traffic Policy [ ]
• Ingress [ ]
• Egress [ ]
• Envoy Control Plane [ ]
• CLI Tool [X]
• Metrics [ ]
• Certificate Management [ ]
• Sidecar Injection [ ]
• Logging [ ]
• Debugging [ ]
• Tests [ ]
• CI System [ ]
• Project Release [ ]

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Use cases:

• osm configure --mesh=osm --policy-mode=permissive -- sets permissive_traffic_policy_mode to true
• osm configure --mesh=osm --policy-mode=smi -- sets permissive_traffic_policy_mode to false

[michelleN]

agree we totally need this. This should be handled by the osm mesh update command imo. #1474

[shashankram]

OSM ConfigMap was deprecated several releases ago, and the formal way to update the mesh configuration is via the MeshConfig custom resource using native k8s tools/API.