Bump golangci-lint to latest version

Done by bumping the version in the Makefile, then running:

  make -C hack/tools bin/golangci-lint
  ./hack/tools/bin/golangci-lint migrate

This yields a number of news error from staticcheck which we temporarily
ignore pending a fix. We also need to replace the removed '--fast=true'
opt with '--fast-only'.

Signed-off-by: Stephen Finucane <[email protected]>

Author: stephenfin