PMM-13392 Strip agent status prefix in json

[ademidoff]

PMM-13392

Link to the Feature Build: SUBMODULES-3754

This PR contains also a few output formatting fixes, which make table output cleaner, providing equal spacing.

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 43.54%. Comparing base (9fcf353) to head (5a026a0).
Report is 1 commits behind head on v3.

Files with missing lines	Patch %	Lines
admin/agentlocal/agentlocal.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##               v3    #3276   +/-   ##
=======================================
  Coverage   43.54%   43.54%           
=======================================
  Files         365      365           
  Lines       44150    44150           
=======================================
+ Hits        19224    19227    +3     
+ Misses      23246    23241    -5     
- Partials     1680     1682    +2     

Flag	Coverage Δ
admin	11.51% <60.00%> (+0.02%)	⬆️

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