Release artifacts should follow a better naming convention

[roele]

Currently tools like ubi or mise are not able to install gitlab-ci-local because they rely on common naming conventions to detect the correct architecture and os. Also gz seems a bit uncommon for Windows.

For example

• linux.gz -> gitlab-ci-local-linux-arm64.tar.gz
• macos.gz -> gitlab-ci-local-darwin-arm64.tar.gz
• win.gz -> gitlab-ci-local-windows-x64.zip

Relates to #704