Make it possible to install from source

[blampe]

The replace directives in go.mod make it impossible to install and run pulumictl from source.

They were originally added as part of #59, however we still seem to cross-compile just fine:

❯ goreleaser build --snapshot --clean
  • starting build...
  • loading config file                              file=.goreleaser.yml
  • loading environment variables
  • getting and validating git state
    • building...                                    commit=eb7f539414133eb4a4a172fe89e211beeeff2a4e latest tag=v0.0.46
    • pipe skipped                                   reason=disabled during snapshot mode
  • parsing tag
  • setting defaults
  • running before hooks
    • running                                        hook=go mod download
    • took: 27s
  • snapshotting
    • building snapshot...                           version=v0.0.46-SNAPSHOT
  • checking distribution directory
    • cleaning dist
  • loading go mod information
  • build prerequisites
  • writing effective config file
    • writing                                        config=dist/config.yaml
  • building binaries
    • building                                       binary=dist/pulumictl_darwin_amd64_v1/pulumictl
    • building                                       binary=dist/pulumictl_windows_amd64_v1/pulumictl.exe
    • building                                       binary=dist/pulumictl_darwin_arm64/pulumictl
    • building                                       binary=dist/pulumictl_linux_arm64/pulumictl
    • building                                       binary=dist/pulumictl_windows_arm64/pulumictl.exe
    • building                                       binary=dist/pulumictl_linux_amd64_v1/pulumictl
    • took: 1m28s
  • storing release metadata
    • writing                                        file=dist/artifacts.json
    • writing                                        file=dist/metadata.json
  • build succeeded after 1m55s
  • thanks for using goreleaser!

[iwahbe]

I vaguely remember that this was because pulumi/pulumi linked in some CGO stuff for file watching.

It should be safe to remove.