Rename and standardize issue templates to .yml

[jbampton]

Let us make it consistent.

At the next link they mention .yml a lot:

https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/configuring-issue-templates-for-your-repository

Example of ours below:

Description

This PR...

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• Build/CI
• Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 17.56%. Comparing base (39126a4) to head (dafde09).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main   #12082   +/-   ##
=========================================
  Coverage     17.56%   17.56%           
- Complexity    15539    15542    +3     
=========================================
  Files          5911     5911           
  Lines        529359   529359           
  Branches      64655    64655           
=========================================
+ Hits          92982    92992   +10     
+ Misses       425919   425906   -13     
- Partials      10458    10461    +3     

Flag	Coverage Δ
uitests	3.58% <ø> (ø)
unittests	18.63% <ø> (+<0.01%)	⬆️

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