many: update golangci-lint and fix lints

General MR

Summary

Upgrade the golangci-lint linter as well as the script that invokes it. Recommend homebrew now and remove the versioning on it.

The updates bring in new linters so fix the lints that arose as a result.

Relevant logs/screenshots

N/A

Linked Issue

part of #51 (closed)

Upgrade Notices

N/A