CI: Update workflows, add Goreleaser, set default eol to LF

[kbdharun]

Changes

• Updated unmaintained marvinpinto/action-automatic-releases@latest (Currently using deprecated Node 12 runner, with unmerged PR to update it to Node 16) action to alternative action softprops/action-gh-release@v1. [This change fixes the Node 12 deprecation warnings and other output warnings in CI]
• Bump actions/setup-go to v4 (this version adds support for caching, improving the build times in PRs).
• Separate go.yml for push and PR similar to ABRoot.
• Add goreleaser.yml to automatically create releases on tagging.
• Set default end of line (eol) to LF using .gitattributes file.