Add an option to put helper logs into a file

[akoshelev]

We need it because stderr is often dropped by the external services (like Kubernetes)

This also adds some verification for our e2e tests to make sure we write something into them

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 14 lines in your changes missing coverage. Please review.

Project coverage is 93.24%. Comparing base (4f112ad) to head (60d158d).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
ipa-core/src/cli/verbosity.rs	33.33%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1493      +/-   ##
==========================================
- Coverage   93.29%   93.24%   -0.05%     
==========================================
  Files         237      237              
  Lines       43510    43534      +24     
==========================================
+ Hits        40592    40595       +3     
- Misses       2918     2939      +21     

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[cberkhoff]

can we have both? K8s logs are easy to pull for many shards whereas going into each host is a hassle