Update issue templates

Author: kayrus

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: bug / feature
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!--
+Please add the affected binary name in the title unless multiple binaries are affected, e.g.
+[cinder-csi-plugin] Cannot delete PV
+For openstack-cloud-controller-manager, you can use [occm] for short.
+
+All the currently maintained binaries are:
+* openstack-cloud-controller-manager (occm)
+* cinder-csi-plugin
+* manila-csi-plugin
+* k8s-keystone-auth
+* client-keystone-auth
+* octavia-ingress-controller
+* magnum-auto-healer
+* barbican-kms-plugin
+-->
+
+**Is this a BUG REPORT or FEATURE REQUEST?**:
+
+> Uncomment only one, leave it on its own line: 
+>
+> /kind bug
+> /kind feature
+
+**What happened**:
+
+
+**What you expected to happen**:
+
+
+**How to reproduce it**:
+
+
+**Anything else we need to know?**:
+
+
+**Environment**:
+- openstack-cloud-controller-manager(or other related binary) version:
+- OpenStack version:
+- Others: