Lock ADOT Operator helm chart version

[bryan-aguilar]

In the current ADOT Operator helm chart deployment found here the latest helm chart is always used. This could cause issue for release/v* branches having a state mismatch with the testing framework.

Would it be a good idea to explicitly pin and update the helm chart to a specific version? When would this update need to happen? This would allow the frozen release/v* branches to specifically target a compatible helm chart.