Merge pull request #3743 from jascott1/issue_template

Add issue_template.md which asks for version info.

.github/issue_template.md

+<!-- If you need help or think you have found a bug, please help us with your issue by entering the following information (otherwise you can delete this text): -->
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+Output of `helm version`:
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+Output of `kubectl version`:
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+Cloud Provider/Platform (AKS, GKE, Minikube etc.): 
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