pulumi about always shows unknown for the dotnet language plugin version

[justinvp]

When running pulumi about for a .NET Pulumi program, it shows unknown for the language plugin version. Instead, it should show the version of the language plugin.

GetPluginInfo is returning version.Version for the version:

pulumi-dotnet/pulumi-language-dotnet/main.go

Lines 805 to 809 in e105d32

	func (host *dotnetLanguageHost) GetPluginInfo(ctx context.Context, req *pbempty.Empty) (*pulumirpc.PluginInfo, error) {
	return &pulumirpc.PluginInfo{
	Version: version.Version,
	}, nil
	}

But the wrong package is being used. It's using "github.com/pulumi/pulumi/sdk/v3/go/common/version" when it should be using "github.com/pulumi/pulumi-dotnet/pulumi-language-dotnet/version" as the latter package's Version variable is the one that's actually being set during build:

pulumi-dotnet/.goreleaser.yml

Lines 17 to 18 in e105d32

	ldflags:
	- -X github.com/pulumi/pulumi-dotnet/pulumi-language-dotnet/version.Version={{.Tag}}