Added virtual size option in artifact ls format

[nothiaki]

Does this PR introduce a user-facing change?

Yes, added the option to format the list showing the virtual size podman artifact ls --format '{{ .VirtualSize }}'
Closes #27085

Added virtual size option for artifact list --format

[nothiaki]

I did not add tests because this test file already cover all commands with flag --format.

podman/test/system/610-format.bats

Lines 25 to 29 in d58e496

	# Main test loop. Recursively runs 'podman [subcommand] help', looks for:
	# > '[command]', which indicates, recurse; or
	# > '--format', in which case we
	# > check autocompletion, look for Go templates, in which case we
	# > run the command with --format '{{"\n"}}' and make sure it passes

[packit-as-a-service]

[NON-BLOCKING] Packit jobs failed. @containers/packit-build please check. Everyone else, feel free to ignore.

[Honny1]

I did not add tests because this test file already cover all commands with flag --format.

podman/test/system/610-format.bats

Lines 25 to 29 in d58e496

	# Main test loop. Recursively runs 'podman [subcommand] help', looks for:
	# > '[command]', which indicates, recurse; or
	# > '--format', in which case we
	# > check autocompletion, look for Go templates, in which case we
	# > run the command with --format '{{"\n"}}' and make sure it passes

Unfortunately, you will need to implement a part of the test yourself, such as creating an artifact. The function you found is a helper, which is called from this test:

podman/test/system/610-format.bats

Line 122 in d58e496

@test "check Go template formatting" {

I am okay with extending the current test to include the creation of an artifact, etc.

[Honny1]

Thanks, LGTM. The failed CI test looks like a flake. Please retrigger it here: https://cirrus-ci.com/task/6296539838021632. As the PR author, you have permission to do so.

/LGTM

[baude]

LGTM

[openshift-ci]

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