Update to `tmpl-go` template repository version `0.12.0`

[svengreb]

Update to tmpl-go version 0.12.0, including the versions in between starting from 0.7.0:

1. Updated to Go 1.17.
2. Updated to golangci-lint v1.43.0.
3. Updated to tmpl template repository version 0.11.0.
4. Optimized GitHub action workflows for Go and Node.
5. Disabled golangci-lint's default excluded issues.
6. Introduced Go dependency caching and build outputs in ci-go workflow.
7. Disabled revive linter rule package-comments.
8. Fixed golangci-lint fail to run due to revives unknown time-equal rule.
9. Updated Node.js packages & GitHub actions.

This will also include changes required for any linter matches.