[DPE-3243][DPE-3246] Async backup and new list-backups output #99

Job	Run time
pre-integration-checks (==3.3.0.0) / Lint	14s
pre-integration-checks (==3.3.0.0) / Check libraries	30s
pre-integration-checks (==3.3.0.0) / Unit tests	3m 55s
integration (3.1/stable, ==3.3.0.0) / Build charms / Get workflow version / Get workflow version	3s
integration (3.1/stable, ==3.3.0.0) / Build charms / Collect charms	13s
integration (3.1/stable, ==3.3.0.0) / Build charms / Build opensearch charm \| 22.04	1m 54s
integration (3.1/stable, ==3.3.0.0) / Build charms / Build application charm \| 22.04	1m 29s
integration (3.1/stable, ==3.3.0.0) / backup-microceph-integration-test	37m 57s
integration (3.1/stable, ==3.3.0.0) / charm-integration	9m 44s
integration (3.1/stable, ==3.3.0.0) / tls-integration	15m 10s
integration (3.1/stable, ==3.3.0.0) / client-integration	26m 54s
integration (3.1/stable, ==3.3.0.0) / ha-base-integration	39m 6s
integration (3.1/stable, ==3.3.0.0) / ha-networking-integration	58m 12s
integration (3.1/stable, ==3.3.0.0) / ha-multi-clusters-integration	17m 3s
integration (3.1/stable, ==3.3.0.0) / large-deployments-integration	22m 39s
integration (3.1/stable, ==3.3.0.0) / plugins-integration	27m 14s
integration (3.1/stable, ==3.3.0.0) / h-scaling-integration	1h 2m 37s
Release to CharmHub	3m 27s
	5h 28m 21s

Provide feedback