Add arm64 and amd64 to CI
This MR overhauls the CI such that:
- Teleports is being built for armhf, arm64 and amd64 in parallel
- Each tdlib build job has its own cache, separate by branch and tag, thus ensuring clean release builds
- Teleports builds are not cached (but saved as artifacts for a week)
- Release builds are kept as artifacts for 30 days
Edited by Jonatan Hatakeyama Zeidler