playbook: remove deprecated usage of get_md5

get_md5 has been deprecated a long time ago: https://github.com/ansible/ansible/commit/8386201242296e842b03f3e3826fcdbdf2dadfcb
15 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.StandaloneDeploymentScriptTest-Debian.Bulleseye.JEROME

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failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

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passed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

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failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

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passed Wendelin.StandaloneDeploymentScriptTest-Debian.Bullseye

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failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

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failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

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failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

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failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

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