Adding warnings for opta destroy and how to start debugging

[juandiegopalomino]

Description

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 #855 (0c14bd8) into main (7ad9474) will decrease coverage by 0.09%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #855      +/-   ##
==========================================
- Coverage   73.86%   73.76%   -0.10%     
==========================================
  Files         120      120              
  Lines        7916     7959      +43     
==========================================
+ Hits         5847     5871      +24     
- Misses       2069     2088      +19     

Flag	Coverage Δ
unittests	73.76% <100.00%> (-0.10%)	⬇️

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Impacted Files	Coverage Δ
opta/cli.py	72.22% <ø> (ø)
opta/commands/destroy.py	57.24% <100.00%> (+0.29%)	⬆️
opta/core/kubernetes.py	46.22% <0.00%> (-1.77%)	⬇️
opta/core/secrets.py	62.50% <0.00%> (-1.14%)	⬇️
opta/commands/secret.py	89.83% <0.00%> (+0.03%)	⬆️

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