Add anacronjobs plugins (unix)

[william-billaud]

Add anacronjobs plugins (unix)

Currently anacrontab are processed as crontab, but anacron use a different format. This PR add a proper parser for anacrontab entries.

Proposed Changes

• Create a dedicated anacrontab plugin

• One main difference with cron, is the presence of timestamp files in the /var/spool/anacron directory. This plugin try to Extract the last execution date from this file. If stored ts date is the same day as the last file modification date, use the file last modification date as "last exec" date, if not just retrieve date from stored timestamp, or none if file is not available.

• As Anacron often use run-parts, add a specific logic to yield script referenced by run-parts, if those scripts are available.

• Remove the anacrontab path from cronjob plugin + use the get_path function, to make this plugin works with --direct

• fixes Anacrontab is not properly processed #1543

Checklist

• PR Title is descriptive of the changes
• The description is descriptive of the changes
• Tests are included and pass
• Closes related issue number

[codecov]

Codecov Report

❌ Patch coverage is 98.21429% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 81.07%. Comparing base (28082eb) to head (df7b5dc).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
dissect/target/plugins/os/unix/anacronjobs.py	98.11%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1872      +/-   ##
==========================================
+ Coverage   81.05%   81.07%   +0.02%     
==========================================
  Files         404      405       +1     
  Lines       36511    36564      +53     
==========================================
+ Hits        29594    29646      +52     
- Misses       6917     6918       +1     

Flag	Coverage Δ
unittests	81.07% <98.21%> (+0.02%)	⬆️

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[codspeed-hq]

Merging this PR will not alter performance

✅ 32 untouched benchmarks

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_{Comparing william-billaud:anacronjob (df7b5dc) with main (28082eb)}