Adding ability to make a exec command health probes

[juandiegopalomino]

Description

At the behest of our users
#876

Safety checklist

• This change is backwards compatible and safe to apply by existing users
• This change will NOT lead to data loss
• This change will NOT lead to downtime who already has an env/service setup

How has this change been tested, beside unit tests?

manually

[codecov]

Codecov Report

Merging #885 (9b66e0d) into main (66df515) will decrease coverage by 0.00%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##             main     #885      +/-   ##
==========================================
- Coverage   72.91%   72.90%   -0.01%     
==========================================
  Files         123      122       -1     
  Lines        8280     8279       -1     
==========================================
- Hits         6037     6036       -1     
  Misses       2243     2243              

Flag	Coverage Δ
unittests	72.90% <75.00%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
modules/base.py	77.75% <75.00%> (-0.06%)	⬇️
opta/cli.py	72.22% <0.00%> (-0.76%)	⬇️
opta/commands/ui.py

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