add issue template for spack package build failure

.gitlab/issue_templates/build-error.md

+<!-- Thanks for taking the time to report this build failure. To proceed with the report please:
+
+1. Title the issue "Installation issue: <name-of-the-package>".
+2. Provide the information required below.
+
+We encourage you to try, as much as possible, to reduce your problem to the minimal example that still reproduces the issue. That would help us a lot in fixing it quickly and effectively! -->
+
+### Summary
+
+|               |                                               |
+|---------------|-----------------------------------------------|
+| Summary       | Spack package build failure                   |
+| Package info  | <!-- Spack package name or entire spec -->    |
+| System        | <!-- HPC cluster name/Collab Lab/other  -->   |
+| Related       | <!-- Other related issues (if applicable) --> |
+
+### Steps to reproduce the issue
+
+<!-- Fill in the console output from the exact spec you are trying to build. -->
+```console
+$ spack spec -I <spec>
+...
+$ spack install <spec>
+...
+```
+
+### Error message
+<!-- Please post the error message from spack inside the <details> tag below: -->
+
+<details><summary>Error message</summary><pre>
+(add error logs here)
+</pre></details>
+
+### Information on your system
+
+<!-- Please include the output of `spack debug report` -->
+
+<!-- If you have any relevant configuration detail (custom `packages.yaml` or `modules.yaml`, etc.) you can add that here as well. -->
+
+### Additional information
+
+<!-- Please upload the following files. They should be present in the stage directory of the failing build. Also upload any config.log or similar file if one exists. -->
+* [spack-build-out.txt]()
+* [spack-build-env.txt]()
+
+/label ~build-error