Switch from github.com/pkg/errors to %w-style wrap

[kolyshkin]

The github.com/pkg/errors is mostly obsoleted since Go 1.13 introduced %w-style error wrapping. It is also not maintained and is now archived by the owner.

Fixes: #3618

- What I did

- How I did it

Mostly by using https://github.com/AkihiroSuda/go-wrap-to-percent-w tool. In some cases, by hand.

- How to verify it

I hope CI is adequate.

- Description for the changelog

Switch from github.com/pkg/errors to %w-style error wrapping.

- A picture of a cute animal (not mandatory but encouraged)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 33.67876% with 256 lines in your changes missing coverage. Please review.

Project coverage is 60.54%. Comparing base (305985c) to head (8eb1567).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5525      +/-   ##
==========================================
- Coverage   60.58%   60.54%   -0.05%     
==========================================
  Files         345      345              
  Lines       23456    23465       +9     
==========================================
- Hits        14211    14207       -4     
- Misses       8273     8284      +11     
- Partials      972      974       +2