RHINENG-13973 execute pcp commands

[r14chandra]

Why do we need this change? 💭

Run pmlogextract on the extracted .index file, followed by pmlogsummary on the resulting output file.

Documentation update? 📝

• Yes
• No

Security Checklist 🔒

Upon raising this PR please go through RedHatInsights/secure-coding-checklist

💂‍♂️ Checklist 🎯

• Bugfix
• New Feature
• Refactor
• Unittests Added
• DRY code
• Dependency Added
• DB Migration Added

Additional 📣

Feel free to add any other relevant details such as links, notes, screenshots, here.

[upadhyeammit]

Though we need the directory and files for temporary purpose however these files are getting passed to next command pmlogsummary, so in this situation I don't think using /tmp is wise idea. The initial impression says the /tmp is managed by systemd-tmpfiles-clean.service so its possible that these could be deleted before pmlogsummary requires it.
Should we look into adding small persistent volume? maybe 250Mb is enough? and there we do these file operations?

[r14chandra]

In that case, we can use the /var/tmp directory. Implementing a persistent volume might be unnecessary for now, especially since I haven't observed insights-core utilizing that.
We can switch to using the /var/tmp directory to store temporary files/directories that may need to survive for longer durations.

[upadhyeammit]

I need to check! If I understand correctly the insights-core does not have duties about collecting data from containers? those are instances of VM?

[upadhyeammit]

The /var/tmp is better choice, I do see security concerns as well when using these directories,
https://www.redhat.com/en/blog/polyinstantiating-tmp-and-vartmp-directories

I have captured both the usage and the security concern in new Jira ticket RHINENG-15674 and we can evaluate it later. As of now lets go with /var/tmp.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 53.16456% with 37 lines in your changes missing coverage. Please review.

Project coverage is 73.66%. Comparing base (0899ee5) to head (55e62a0).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
ros/processor/suggestions_engine.py	53.16%	37 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #576      +/-   ##
==========================================
- Coverage   74.51%   73.66%   -0.86%     
==========================================
  Files          34       34              
  Lines        1797     1906     +109     
==========================================
+ Hits         1339     1404      +65     
- Misses        458      502      +44     

Flag	Coverage Δ
unittests	73.66% <53.16%> (-0.86%)	⬇️

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