But what if I want to only run the formatters for a specific workflow. We used to use--enable-only gci,gofmt --fix flag to do so, which I guess we could still do, but would be nice to have aformatters-only option or something, so it would automatically pick up the enabled formatters in the config file.

No need to callgofmt manually, just do that (aftergolangci/golangci-lint-action@v7 step):

      -name:fmtrun:golangci-lint fmt --diff --enable gofmt

But I recommend using a configuration file instead.