docker go sdk for clab-io-draw

[FloSch62]

This closes #2361

Using docker go sdk
Fix smoke test for drawio generation.

[FloSch62]

I was thinking to use the implemations from runtime/docker, but I was not able to use them, so I implemented the docker client in graph.go . It's a bit weird to have func forcePull in graph.go, but thats my current limit of my go skills...

[codecov]

Codecov Report

Attention: Patch coverage is 44.97041% with 93 lines in your changes missing coverage. Please review.

Project coverage is 51.76%. Comparing base (0077e9f) to head (d6d6de4).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
clab/graph.go	44.97%	77 Missing and 16 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2363      +/-   ##
==========================================
- Coverage   51.88%   51.76%   -0.12%     
==========================================
  Files         172      172              
  Lines       17136    17240     +104     
==========================================
+ Hits         8891     8925      +34     
- Misses       7318     7374      +56     
- Partials      927      941      +14     

Files with missing lines	Coverage Δ
clab/graph.go	21.98% <44.97%> (+7.48%)	⬆️

... and 2 files with indirect coverage changes