Don't set empty property descriptions

[tas50]

What category of cop is this?:

Please try to select as few as possible.

• Chef/Deprecations - A cop that alerts on a deprecation in the Chef Infra Client
• Chef/Correctness - A cop that alerts when incorrect coding behavior is being used
• Chef/Sharing - A cop that alerts to missing functionality necessary for sharing cookbooks with others
• Chef/Style - A cop that alerts to a style best practice
• Chef/Modernize - A cop that alerts when a cookbook can be simplified or modernized with new functionality
• Chef/Effortless - A cop that alerts on code that must be resolved to move to the Effortless pattern
• Chef/RedundantCode - A cop that detects redundant code regardless of Chef Infra release
• InSpec/Deprecations - A cop that alerts on a deprecation in the Chef InSpec

Describe the new cop:

There's no point in setting an empty string as a desription.

What it would trigger on:

property :site_name, String,
         name_property: true,
         description: ''

What it would autocorrect to if applicable

N/A