Update issue templates

.github/ISSUE_TEMPLATE/performance-related-questions.md

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+---
+name: Performance-related Questions
+about: Any questions related to TDengine's performance
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Performance Issue**
+Any questions related to TDengine's performance can be discussed here.
+
+**Problem Description**
+A clear and concise description of what the problem is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Database parameters used: 
+```show databases```
+2. Verbs used: Insert/Import/Select?
+3. Describe the total amount of data
+4. Observed performance vs. expected performance
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Environment (please complete the following information):**
+ - OS: [e.g. CentOS 7.0]
+ - Memory, CPU, current Disk Space
+ - TDengine Version [e.g. 1.6.1.7]
+
+**Additional Context**
+Add any other context about the problem here.