connectedk8s should validate the helm version

(This bug was created in conjunction with a debug session with the connectedk8s team).

*Repro*
Create a link from helm to microk8s.helm (instead of to microk8s.helm3).

*What*
The connectedk8s cli collects the version of helm, but only uses it for telemetry. The output generated is:
```
helm version --short --client
Helm not available, try enabling it with 'microk8s enable helm'
```
When it should look like:
`v3.0.2+g19e47ee`

Fix:
Parse the output to validate the `v3`, before sending to telemetry.