chore : Added PR and Issue template

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Report a bug encountered while upgrading openebs volumes/pools
+labels: kind/bug
+
+---
+
+<!-- Please use this template while reporting a bug and provide as much info as possible.
+     Not doing so may result in your bug not being addressed in a timely manner. Thanks!
+-->
+
+**Describe the bug:** A clear and concise description of what the bug is.
+
+**Expected behaviour:** A concise description of what you expected to happen
+
+**Steps to reproduce the bug:**
+Steps to reproduce the bug should be clear and easily reproducible to help people gain an understanding of the problem
+
+**The output of the following commands will help us better understand what's going on**:
+<!-- (Pasting long output into a [GitHub gist](https://gist.github.com) or other [Pastebin](https://pastebin.com/) is fine.) -->
+
+* `kubectl get pods -n <openebs_namespace> --show-labels`
+* `kubectl logs <upgrade_job_pod> -n <openebs_namespace>`
+
+**Anything else we need to know?:**
+Add any other context about the problem here.
+
+**Environment details:**
+- OpenEBS version (use `kubectl get po -n openebs --show-labels`):
+- Kubernetes version (use `kubectl version`):
+- Cloud provider or hardware configuration:
+- OS (e.g: `cat /etc/os-release`):
+- kernel (e.g: `uname -a`):
+- others:

.github/ISSUE_TEMPLATE/feature-request.md

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+---
+name: Feature request
+about: Suggest an idea to improve openebs upgrades
+labels: Enhancement
+
+---
+
+**Describe the problem/challenge you have**
+[A description of the current limitation/problem/challenge that you are experiencing.]
+
+
+**Describe the solution you'd like**
+[A clear and concise description of what you want to happen.]
+
+
+**Anything else you would like to add:**
+[Miscellaneous information that will assist in solving the issue.]
+
+
+**Environment:**
+- OpenEBS version (use `kubectl get po -n openebs --show-labels`):
+- Kubernetes version (use `kubectl version`):
+- Cloud provider or hardware configuration:
+- OS (e.g: `cat /etc/os-release`):
+- kernel (e.g: `uname -a`):
+- others:

.github/pull_request_template.md

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+<!--  Thanks for sending a pull request!  Before submitting:
+
+1. Read our CONTRIBUTING.md guide for detailed contributing guidelines.
+2. Rebase your PR if it gets out of sync with master
+-->
+
+**What this PR does**:
+
+**Which issue(s) this PR fixes**:
+Fixes #<issue number>
+
+
+**Special notes for your reviewer**:
+
+**Checklist**
+- [ ] PR messages has document related information
+- [ ] Labelled this PR & related issue with `documentation` tag
+- [ ] PR messages has breaking changes related information
+- [ ] PR messages has upgrade related information
+- [ ] Labelled this PR & related issue with `requires-upgrade` tag
+- [ ] Tests updated