Update issue template

Github has started using a new issue templating structure.
This commit moves the current template and adds one additional one.

- Moves issue template to new issue-template folder
- Adds feature request template
- removes the following warning when viewing issue template

Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Kjeld Schouten-Lebbing <kjeld@schouten-lebbing.nl>
Closes #10759

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,53 @@
+---
+name: Bug report
+about: Create a report to help us improve OpenZFS
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!-- Please fill out the following template, which will help other contributors address your issue. -->
+
+<!--
+Thank you for reporting an issue.
+
+*IMPORTANT* - Please check our issue tracker before opening a new issue.
+Additional valuable information can be found in the OpenZFS documentation
+and mailing list archives.
+
+Please fill in as much of the template as possible.
+-->
+
+### System information
+<!--  add version after "|" character -->
+Type | Version/Name
+ --- | ---
+Distribution Name	|
+Distribution Version	|
+Linux Kernel	|
+Architecture	|
+ZFS Version	|
+SPL Version	|
+<!--
+Commands to find ZFS/SPL versions:
+modinfo zfs | grep -iw version
+modinfo spl | grep -iw version
+-->
+
+### Describe the problem you're observing
+
+### Describe how to reproduce the problem
+
+### Include any warning/errors/backtraces from the system logs
+<!--
+*IMPORTANT* - Please mark logs and text output from terminal commands
+or else Github will not display them correctly.
+An example is provided below.
+
+Example:
+```
+this is an example how log text should be marked (wrap it with ```)
+```
+-->
+

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,33 @@
+---
+name: Feature request
+about: Suggest a feature for OpenZFS
+title: ''
+labels: 'Type: Feature'
+assignees: ''
+
+---
+
+<!--
+Thank you for suggesting a feature.
+
+Please check the our issue tracker before opening a new feature request.
+Filling out the following template will help other contributors better understand your proposed feature.
+-->
+
+### Describe the feature would like to see added to OpenZFS
+
+<!--
+Provide a clear and concise description of the feature.
+-->
+
+### How will this feature improve OpenZFS?
+
+<!--
+What problem does this feature solve?
+-->
+
+### Additional context
+
+<!--
+Any additional information you can add about the proposal?
+-->