Use the new github template (#3421)

Author: fehiepsi

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Pyro Discussion Forum
+    url: https://forum.pyro.ai/
+    about: For general questions about Pyro, please use the forum instead of GitHub issues.

.github/issue_template.md .github/ISSUE_TEMPLATE/issue_template.md

@@ -1,3 +1,8 @@
+---
+name: General Issue
+about: Report a bug or request a feature
+---
+
 <!--
 Copyright Contributors to the Pyro project.