chg: remove deprecated docker push on old registry

[marcello33]

Description

This PR removes the dockerimage.yml GH action. It is deprecated and it's anyway pushing on the old registry, while the new releaser uses the new registry

Changes

• Bugfix (non-breaking change that solves an issue)
• Hotfix (change that solves an urgent issue, and requires immediate attention)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)
• Changes only for a subset of nodes

Checklist

• I have added at least 2 reviewer or the whole pos-v1 team
• I have added sufficient documentation in code
• I will be resolving comments - if any - by pushing each fix in a separate commit and linking the commit hash in the comment reply

Additional comments

Aligned with DevOps.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (d2bde62) 76.59% compared to head (a1729e9) 76.59%.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1114   +/-   ##
========================================
  Coverage    76.59%   76.59%           
========================================
  Files           53       53           
  Lines         5922     5922           
========================================
  Hits          4536     4536           
  Misses        1128     1128           
  Partials       258      258           

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