fix(deliverability-stats): show all errors in descending order

[ben-pr-p]

Description

This PR fixes the sorting of message error codes and removes the .slice(0, 5), so all error codes are shown.

The previous use of .sort((a, b) => -1 | 0 | 1) was treating it like a .sortBy function, which had the effect of doing no sorting and leaving the elements in their server returned order.

How Has This Been Tested?

Locally

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My commit messages follow the Conventional Commits specification.
• My change requires a change to the documentation.
• I have included updates for the documentation accordingly.