* `dvc machine`: add a new command `rename` to it
fix#6481
1. add new command `dvc machine rename`
2. add a unit test for the call.
3. add several functional tests for it.t push myself fix6481
* Move rename logic to tpi
* use tpi.state_mv instead of rename
* Rebase to a newer version
* Update tpi version
* Remove unused assert and try catch