playbook: make it possible to run playbook when apt repository is broken

See merge request !179
7 jobs for master in 0 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  External
passed ERP5.StandaloneDeploymentScriptTest-Debian.Bullseye

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passed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

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failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

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passed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Bullseye

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passed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

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passed Wendelin.StandaloneDeploymentScriptTest-Debian.Bullseye

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passed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

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