v2.5.1

ci: optimize build matrix to only linux and darwin on amd64/arm64

This reduces the build matrix in release.yml and tag-and-release.yml
to only build for linux and darwin on amd64 and arm64 architectures,
dropping all other combinations.

This commit has been created by an automated coding assistant,
with human supervision.

Prompt:
new feature, new worktree: update the build matrix in the github workflow to build only for darwin, and linux on arm and x64; remove all others