Inf 418/add dag tags to workflows

[tuanchien]

Setting up platform changes for adding vm create/destroy and elastic import workflow tagging.

Ran into an issue when testing locally. Error was similar to:
apache/airflow#22289

which seems to be fixed in Airflow 2.3.0

However, erasing my local postgres db and starting the platform up with clean db did not present the problem.

[codecov]

Codecov Report

Merging #572 (53aac30) into develop (faa1d1b) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #572      +/-   ##
===========================================
+ Coverage    93.93%   93.97%   +0.03%     
===========================================
  Files           49       50       +1     
  Lines         6781     6783       +2     
  Branches       763      763              
===========================================
+ Hits          6370     6374       +4     
+ Misses         299      294       -5     
- Partials       112      115       +3     

Impacted Files	Coverage Δ
...tory/platform/workflows/elastic_import_workflow.py	82.33% <ø> (ø)
...latform/observatory/platform/workflows/workflow.py	93.45% <ø> (-0.04%)	⬇️
...servatory-platform/observatory/platform/dag_tag.py	100.00% <100.00%> (ø)
...form/observatory/platform/workflows/vm_workflow.py	100.00% <100.00%> (ø)
...ry-platform/observatory/platform/utils/gc_utils.py	84.17% <0.00%> (+0.43%)	⬆️

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[jdddog]

Thanks Tuan!