Create pull_request_template.md

.github/pull_request_template.md

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+#### What type of PR is this?
+- [ ] bug
+- [ ] feature
+
+#### Which issue(s) this PR fixes:
+close #xxx   
+（If it is requirement, issue(s) number must be listed.）
+
+#### What this PR does / why we need it?
+
+
+#### Special notes for your reviewer, ex. impact of this fix, etc:
+
+
+#### Additional context:
+
+
+#### Checklist：
+- [ ] Documentation affected （If need to modify document, please label it.)
+- [ ] Incompatible （If it is incompatile, please describle it and label it.）
+- [ ] Need to cherry pick （If need to cherry pick to some branchs, please label the destination version(s).)
+- [ ] Performance regression: Consumes more CPU
+- [ ] Performance regression: Consumes more Memory
+
+
+
+#### Release notes：
+Please confirm whether to reflect in release notes and how to describe:
+>                                                                 `