GH: use an issue form for bug reports

Lots of bug reports currently just omit information which we'd like
to have. Usually this means we have to ask follow up question.

Let's try using an issue form in the hopes of getting more complete
answers.

Signed-off-by: Lorenz Bauer <lmb@isovalent.com>

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,36 @@
+name: Bug report
+description: Create a report to help us improve
+labels: ["bug"]
+assignees: []
+
+body:
+  - type: markdown
+    attributes:
+      value: "Thank you for reporting a bug. Please fill out the fields below."
+
+  - type: textarea
+    attributes:
+      label: Describe the bug
+      description: |
+        A clear and concise description of what the bug is.
+        Include what you expected to happen instead.
+      render: markdown
+    validations:
+        required: true
+
+  - type: textarea
+    attributes:
+      label: How to reproduce
+      description: "Steps to reproduce the behavior."
+      render: shell
+    validations:
+        required: true
+
+  - type: input
+    id: version
+    attributes:
+      label: Version information
+      description: The output of `go list -m github.com/cilium/ebpf`.
+      placeholder: github.com/cilium/ebpf vX.Y.Z
+    validations:
+        required: true