Update issue templates

.github/ISSUE_TEMPLATE/general-template.md

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+---
+name: General Template
+about: Template for submitting issues
+title: DO NOT SUBMIT ISSUES TO THIS REPO
+labels: ''
+assignees: ''
+
+---
+
+Hello! Thank you for submitting an issue to our repository. **HOWEVER**, don't do it here. We don't monitor this repository, and all the files are autogenerated so any issues submitted here will be in vain.
+
+Please submit your issue to the [azure-iot-sdk-c repo](https://github.com/Azure/azure-iot-sdk-c), and add "Arduino PAL" in the issue title. 
+
+Thanks!