'go run' uses GOOS=linux for local tools, even on non-linux platforms

[grokspawn]

operator-controller/Makefile

Line 115 in 4ea83e6

docker-build: export GOOS=linux

makes GOOS 'sticky' for follow-on operations, and since it is the first dependency for the 'run' target, it /might/ be run first and carry that value over to other targets.

[joelanford]

Nah, that won't work. It's the build step that actually needs GOOS=linux, but only when build is invoked on behalf of docker-build. When build in invoked directly, it should use the host default GOOS.

[joelanford]

Here's what rukpak does: https://github.com/operator-framework/rukpak/blob/444cc33c70ec115517b74a12e1055650329baf6e/Makefile#L182-L183

Separate target for linux binaries.