Remove extra flags on docker app inspect command

[silvin-lubecki]

- What I did
orchestrator and namespace flags are not needed, as they are parameters stored in the claim so we can retrieve them. The user shouldn't be allowed to override them.

Also removed default orchestrator code for inspect, as orchestrator is not mandatory for every bundles (some bundles may just run on a single engine).

- Description for the changelog

• Removed orchestrator and namespace flags for docker app inspect command

- A picture of a cute animal (not mandatory)

[codecov]

Codecov Report

Merging #751 into master will increase coverage by 0.65%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #751      +/-   ##
==========================================
+ Coverage   68.59%   69.25%   +0.65%     
==========================================
  Files          63       63              
  Lines        3477     3428      -49     
==========================================
- Hits         2385     2374      -11     
+ Misses        775      738      -37     
+ Partials      317      316       -1

Impacted Files	Coverage Δ
internal/commands/inspect.go	17.46% <0%> (+1.21%)	⬆️
internal/inspect/inspect.go	89.2% <85.71%> (+0.5%)	⬆️
internal/commands/push.go	33.58% <0%> (+0.87%)	⬆️

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