cmd, pkg/podman: Add command rename

[martymichal]

Renaming of containers has been made possible by Podman v3.0.0. Let's advertise it in Toolbox, too.

The wrapper in pkg/podman makes use of a new helper function that parses the output of Podman in stderr (removes the "Error: " prefix) so that it can be appended to Toolbox's error messages.

[softwarefactory-project-zuul[bot]]

Build failed.

• unit-test : SUCCESS in 2m 30s
• system-test-fedora-33 : FAILURE in 7m 17s
• system-test-fedora-34 : FAILURE in 7m 59s
• system-test-fedora-rawhide : FAILURE in 14m 18s

[softwarefactory-project-zuul[bot]]

Build failed.

• unit-test : SUCCESS in 2m 23s
• system-test-fedora-33 : FAILURE in 7m 32s
• system-test-fedora-34 : SUCCESS in 7m 15s
• system-test-fedora-rawhide : SUCCESS in 12m 53s

[Yongbeom-Kim]

Any updates on this @HarryMichal ? Happy to work on this to get it merged

[jadahl]

This could use a rebase...

[martymichal]

@Yongbeom-Kim, feel free to continue this in my stead. The feature itself is straightforward and the needed rebase should be, too. @debarshiray, is this something we want? :)