github: use the new issue template (#64983)

Create new categories for the issues:

* Bug report
* Packaging request
* Security

Add metadata information to the issues so that we may match issues to
maintainers using a bot in the future.

The old `.github/ISSUE_TEMPLATE.md` is being used by the "Open a regular
issue." link.

.github/ISSUE_TEMPLATE/packaging_request.md

@@ -0,0 +1,18 @@
+---
+name: Packaging requests
+about: For packages that are missing
+title: ''
+labels: '0.kind: packaging request'
+assignees: ''
+
+---
+
+**Project description**
+_describe the project a little_
+
+**Metadata**
+
+* homepage URL:
+* source URL:
+* license: mit, bsd, gpl2+ , ...
+* platforms: unix, linux, darwin, ...