Use a better way of pinning the version of golangci-lint

Instead of requiring the user to install the right version of the tool in their
.bin folder, create a shim that automatically runs the right version of the
tool. This has several benefits:
- it works out of the box with no setup required (the tool will be automatically
  downloaded and compiled the first time it is used)
- no work needed for developers when we bump the golangci-lint version
- it works in working copies that are used in different environments (e.g.
  locally on a Mac, or inside a dev container)

Co-authored-by: kyu08 <49891479+kyu08@users.noreply.github.com>

scripts/golangci-lint-shim.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+set -e
+
+# Must be kept in sync with the version in .github/workflows/ci.yml
+version="v2.2.1"
+
+go run "github.com/golangci/golangci-lint/v2/cmd/golangci-lint@$version" "$@"