build-dev-docker.bash script fails on non-Linux when GOBIN is set

[kenjenkins]

          yes, errored out with 

go: cannot install cross-compiled binaries when GOBIN is set
make: *** [deps-release] Error 1

Originally posted by @joeattueyi in #5069 (comment)

[kenjenkins]

For example, on macOS I can reproduce this error by running:

$ GOBIN=~/go/bin/tmp ./scripts/build-dev-docker.bash 
+ _dir=/tmp/pomerium-dev-docker
+ mkdir -p /tmp/pomerium-dev-docker
+ env GOOS=linux make build
==> yarn
cd ui ; yarn install --network-timeout 120000
yarn install v1.22.19
[1/4] 🔍  Resolving packages...
success Already up-to-date.
✨  Done in 0.08s.
==> build-ui
yarn run v1.22.19
$ ts-node ./scripts/esbuild.ts

  dist/index.js     3.3mb ⚠️
  dist/index.css  129.3kb

✨  Done in 2.03s.
==> get-envoy
==> deps-build
==> deps-release
go: cannot install cross-compiled binaries when GOBIN is set
make: *** [deps-release] Error 1