[helm] test-canary template doesn't respect test.enabled flag

[aledefault]

Describe the bug
test-canary template only checks if Loki Canary is enabled (lokiCanary.enabled). It should also checks test.enabled.

To Reproduce

1. Install using Helm and using a value of test.enabled: false

To fix it

# test-canary.yaml
...
{{- if and .enabled $.Values.lokiCanary.enabled }}
...

Expected behavior
If test.enabled is false, loki-helm-test should not be deploy.

Environment:

• Infrastructure: Kubernetes
• Deployment tool: Helm