Support array of key/value in a selection when creating detection rule using visual editor

[amsiglan]

Description

Some SIGMA rules have detection formatted such that a selection can contain an array of key/value pairs instead of an object with key/values. Added extra parsing logic to support cloning such rules using the visual editor

Check List

• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5bf43a6) 31.18% compared to head (dd80dae) 31.18%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #803      +/-   ##
==========================================
- Coverage   31.18%   31.18%   -0.01%     
==========================================
  Files         151      151              
  Lines        4999     5009      +10     
  Branches      855      859       +4     
==========================================
+ Hits         1559     1562       +3     
- Misses       3250     3257       +7     
  Partials      190      190              

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[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-2.x 2.x
# Navigate to the new working tree
cd .worktrees/backport-2.x
# Create a new branch
git switch --create backport/backport-803-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 7154042e6d34d747a59ee861ae3b07f78be73fe7
# Push it to GitHub
git push --set-upstream origin backport/backport-803-to-2.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-803-to-2.x.