WIP - Add distributed claim store through Kubernetes' secrets

[ulyssessouza]

- What I did
Implement distrubuted claim store for installations targeting kubernetes (with compose-on-kubernetes)

- How I did it
Just detect a kubernetes target by the context. If k8s, then use secrets as store for in a dedicated namespace (called docker-app)

- How to verify it
Create a new docker context pointing to a kuberneted with compose-on-kubernetes installed then install an app. Check in the dashboard that a new namespace called docker-app was created and that the corresponding secret has also been created.

- Description for the changelog
Add kubernetes as a claim store.

- A picture of a cute animal (not mandatory)

[codecov]

Codecov Report

Merging #794 into master will decrease coverage by 2%.
The diff coverage is 14.81%.

@@           Coverage Diff            @@
##           master     #794    +/-   ##
========================================
- Coverage   70.03%   68.03%    -2%     
========================================
  Files          67       69     +2     
  Lines        3684     3807   +123     
========================================
+ Hits         2580     2590    +10     
- Misses        759      867   +108     
- Partials      345      350     +5

Impacted Files	Coverage Δ
internal/store/installation.go	78.12% <ø> (ø)	⬆️
internal/store/crud/kubernetes.go	0% <0%> (ø)
internal/commands/root.go	60% <100%> (ø)	⬆️
internal/store/utils.go	100% <100%> (ø)
internal/store/app.go	57.14% <29.41%> (-16.2%)	⬇️
internal/commands/run.go	61.45% <50%> (-0.91%)	⬇️
internal/commands/update.go	55.73% <50%> (-1.16%)	⬇️
internal/commands/list.go	75.96% <50%> (-1.02%)	⬇️
internal/commands/inspect.go	47.69% <50%> (-0.7%)	⬇️
internal/commands/remove.go	49.15% <50%> (-0.85%)	⬇️
... and 2 more

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