update proxmox-backup to 2.1.8-1 with dependencies

[MAFLO321]

• update proxmox-acme to 1.4.2
• update proxmox-backup to 2.1.8-1
• update proxmox-i18n to 2.7-1
• update proxmox-widget-toolkit to 3.4-10
• update pve-eslint to 8.4.0-3

[MAFLO321]

• [x] wait until proxmox-backup-server 2.1.8-1 is released in the pbs-no-subscription repo
• [x] wait until pbs-i18n 2.7-1 is released in the pbs-no-subscription repo
• [x] wait until proxmox-widget-toolkit 3.4-10 is released in the pbs-no-subscription repo

[wofferl]

Thanks