Replace 'github.com/pkg/errors' with 'errors'

[alexandear]

Description

This PR replaces usages of the archived package github.com/pkg/errors with errors and fmt packages.

Follows #8256

github.com/pkg/errors was not deleted from ATTRIBUTIONS.md because it is an indirect dependency for a few packages.

I used these commands to automate the refactoring process:

# Update `errors.Wrapf`:
find . -name "*.go" -exec sed -i '' -E 's/errors\.Wrapf\(([^,]+), "([^"]+)", ([^)]+)\)/fmt.Errorf\("\2: %w", \3, \1\)/g' {} +

# Update `errors.Wrap`:
find . -name "*.go" -exec sed -i '' -E 's/errors\.Wrap\(([^,]+), "([^"]+)"\)/fmt.Errorf\("\2: %w", \1\)/g' {} +

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the userdocs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes
• (Core team) Added labels for change area (e.g. area/nodegroup) and kind (e.g. kind/improvement)

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[cheeseandcereal]

Looks great! Thanks for the contribution