Enhancement: Reduce progress bar refresh rates to reduce energy usage

Progress bars were updated at 60 fps, which could cause high CPU or GPU usage
in some terminal emulators. The refresh rate is now 10 fps to conserve energy.
For some terminal emulators, the lower rate is also necessary to allow selecting
text in the terminal.

https://github.com/restic/restic/issues/5383
https://github.com/restic/restic/pull/5551
https://github.com/restic/restic/pull/5626
