Release Go binaries on release

### As a

Polkadot node operator

### I want to

```markdown
get started with Gossamer as quickly as possible by downloading a pre-built binary.

To attach built binaries to Github releases:

- Use the goreleaser github action
- Note binaries will only work on Linux, probably just on glibc as well.
- Release Go binaries for common CPU architectures like amd64, arm64.
```

### Because

```markdown
I don't know/like using Docker images
```