chore: update new issue template

.github/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+Thanks for stopping by to let us know something could be better!
+
+**PLEASE READ**: If you have a support contract with Google, please create an issue in the [support console](https://cloud.google.com/support/) instead of filing on GitHub. This will ensure a timely response.
+
+Please run down the following list and make sure you've tried the usual "quick fixes":
+
+  - Search the issues already opened: https://github.com/googleapis/nodejs-spanner/issues
+  - Search the issues on our "catch-all" repository: https://github.com/googleapis/google-cloud-node
+  - Search StackOverflow: http://stackoverflow.com/questions/tagged/google-cloud-platform+node.js
+
+If you are still having issues, please be sure to include as much information as possible:
+
+#### Environment details
+
+  - OS:
+  - Node.js version:
+  - npm version:
+  - `@google-cloud/spanner` version:
+
+#### Steps to reproduce
+
+  1. ?
+  2. ?
+
+Making sure to follow these steps will guarantee the quickest resolution possible.
+
+Thanks!

.github/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this library
+
+---
+
+Thanks for stopping by to let us know something could be better!
+
+**PLEASE READ**: If you have a support contract with Google, please create an issue in the [support console](https://cloud.google.com/support/) instead of filing on GitHub. This will ensure a timely response.
+
+ **Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+ **Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+ **Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+ **Additional context**
+Add any other context or screenshots about the feature request here.

.github/support_request.md

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+---
+name: Support request
+about: If you have a support contract with Google, please create an issue in the Google Cloud Support console.
+
+---
+
+**PLEASE READ**: If you have a support contract with Google, please create an issue in the [support console](https://cloud.google.com/support/) instead of filing on GitHub. This will ensure a timely response.