Deploy loader.svn 1.7

includes:

• Performance improvment on the export_temporary method

staging:

• Build docker images
  • swh-loader-svn [1]
  • swh-loader-savecodenow [2]
• swh-charts: Bump images' version
• Deploy
• Checks

production:

• Build debian package (thx @anlambert which did the necessary changes so it builds correctly)
• Upgrade package on worker nodes
• swh-charts: merge staging branch in production and push [3]
• (ongoing) Restart swh-worker@loader_svn
• Checks

common:

• Tag in grafana

[1] https://jenkins.softwareheritage.org/job/swh-apps/job/build-docker-image/107/console

[2] https://jenkins.softwareheritage.org/job/swh-apps/job/build-docker-image/108/console

[3] That's taking care of deploying the loader save-code-now (production)