Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: "[BUG]"
+labels: kind/bug
+assignees: ''
+
+---
+
+**Describe the bug:**
+A clear and concise description of what the bug is.
+
+**Expected behaviour:**
+A clear and concise description of what you expected to happen.
+
+**How To Reproduce (as minimally and precisely as possible):**
+
+**Logs:**
+
+**Screenshots (if applicable):**
+
+
+**Environment (please complete the following information):**
+ - Etcd version/commit ID :
+ - Etcd-backup-restore version/commit ID:
+ - Cloud Provider [All/AWS/GCS/ABS/Swift]: 
+
+**Anything else we need to know?**:

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an improvement for this project
+title: "[Feature]"
+labels: kind/enhancement
+assignees: ''
+
+---
+
+**Feature (What you would like to be added):**
+
+**Motivation (Why is this needed?):**
+
+**Approach/Hint to the implement solution (optional):**