fix: add docker to the LTS container images

[plumpy]

This fixes an issue where kpt functions wouldn't work in rendering since they depend on docker to run.

[codecov]

Codecov Report

Merging #8905 (2a95ccf) into main (290280e) will decrease coverage by 6.72%.
The diff coverage is 48.99%.

@@            Coverage Diff             @@
##             main    #8905      +/-   ##
==========================================
- Coverage   70.48%   63.77%   -6.72%     
==========================================
  Files         515      622     +107     
  Lines       23150    31589    +8439     
==========================================
+ Hits        16317    20145    +3828     
- Misses       5776     9934    +4158     
- Partials     1057     1510     +453     

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/completion.go	13.04% <0.00%> (-1.25%)	⬇️
cmd/skaffold/app/cmd/config/list.go	65.21% <ø> (ø)
cmd/skaffold/app/cmd/config/set.go	88.72% <ø> (ø)
cmd/skaffold/app/cmd/config/util.go	54.28% <ø> (ø)
cmd/skaffold/app/cmd/credits.go	100.00% <ø> (ø)
cmd/skaffold/app/cmd/credits/export.go	0.00% <0.00%> (ø)
cmd/skaffold/app/cmd/deploy.go	40.90% <0.00%> (-12.94%)	⬇️
cmd/skaffold/app/cmd/generate_pipeline.go	60.00% <ø> (ø)
cmd/skaffold/app/cmd/inspect_modules.go	65.00% <ø> (ø)
cmd/skaffold/app/cmd/inspect_profiles.go	66.66% <ø> (ø)
... and 40 more

... and 414 files with indirect coverage changes

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[ericzzzzzzz]

kokoro job is broken, we can ignore that at the moment.