cscli hub update: option --with-content to keep embedded items in index; use it in docker

[mmetc]

backport to 1.6.3 from #3192

[github-actions]

@mmetc: There are no area labels on this PR. You can add as many areas as you see fit.

• /area agent
• /area local-api
• /area cscli
• /area appsec
• /area security
• /area configuration

Details

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[codecov]

Codecov Report

Attention: Patch coverage is 57.69231% with 11 lines in your changes missing coverage. Please review.

Project coverage is 50.81%. Comparing base (b754c39) to head (29a7d1e).
Report is 2 commits behind head on releases/1.6.x.

Files	Patch %	Lines
pkg/cwhub/remote.go	50.00%	7 Missing and 2 partials ⚠️
cmd/crowdsec-cli/hub.go	75.00%	2 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                 @@
##           releases/1.6.x    #3195      +/-   ##
==================================================
+ Coverage           50.79%   50.81%   +0.02%     
==================================================
  Files                 326      326              
  Lines               38680    38704      +24     
==================================================
+ Hits                19647    19667      +20     
+ Misses              17104    17102       -2     
- Partials             1929     1935       +6     

Flag	Coverage Δ
bats	40.24% <78.94%> (-0.02%)	⬇️
unit-linux	33.89% <0.00%> (-0.03%)	⬇️
unit-windows	28.38% <0.00%> (+<0.01%)	⬆️

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