chore(release): use goreleaser

[kindermoumoute]

Notes:

• Secrets GPG_PRIVATE_KEY, PASSPHRASE and GITHUB_TOKEN must be set
• Changelog does not use conventional commit (this is not a feature of goreleaser)
• Version is set through a ldflag github.com/scaleway/terraform-provider-scaleway/scaleway.version={{.Version}}, either we choose not to commit version anymore, either we add some kind of post-release workflow that open a PR

[remyleone]

Should we use a script similar to the one in https://github.com/scaleway/scaleway-cli to have the environment variables set the credentials available?

[kindermoumoute]

Should we use a script similar to the one in https://github.com/scaleway/scaleway-cli to have the environment variables set the credentials available?

There are too many difference between a CLI release and a terraform plugin release to use the same script ultimately:

• Terraform GPG keys process
• CLI release container, distribution-specific package, ...