Use GitHub issue form feature for bug reports

[EzraBrooks]

Description

I found filing #2982 frustrating because we ask so many questions in the bug report template and you have to jump your cursor around a bunch. This PR switches from a Markdown template to GitHub's new "issue forms" that make it a lot easier to file issues.

Here's an example of what this will look like in action (from another project):

Checklist

• Required by CI: Code is auto formatted using clang-format
• Extend the tutorials / documentation reference
• Document API changes relevant to the user in the MIGRATION.md notes
• Create tests, which fail without this PR reference
• Include a screenshot if changing a GUI
• While waiting for someone to review your request, please help review another open pull request to support the maintainers

[sea-bass]

This is cool! I may have to yoink this pattern for some of my repos.