Motivation

It's been on the TODO list for a long time to create a PR template. The initial attempt in #6084 ended up becoming stale, mostly because the template was a little too involved. Moreover, the long list of check boxes in the template lead to all issues having something like "2 of 14 tasks" indicators in the overview, which is a bit misleading, since some of them are single choice lists so PRs will always appear as incomplete unless you delete the list of tasks.

The Motivation and Changes structure has found itself into many PRs by a number of Authors. Examples:

• fix mapping of insufficient scopes return value to access denied exception #8251
• Add more detail in cloudformation stack deploy failure #8289
• improve docker integration with localstack start command #8772
• Set download retries and log download exceptions for installer failures #7600
• Lambda revisions #7482
• Additional debugging for network connection failure #8602
• sqs: add ability to define the external port #1047

So it seems this could be a good minimal standard structure!

Changes

• Update the pull_request_template.md with a bare-bone template and some additional optional sections behind comments
• Added very brief comments what to write into the section (keep it simple)
• Added some additional optional sections (Testing and TODO, which I've found useful in the past)
• Moved the hint about contribution guidelines into a comment to make sure we don't end up with more PRs that just have that in their description