[2.9] Backport [#722] fix null query filter conversion from sigma to query string query

[eirsep]

Description

Backports #722 to 2.9

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a941222) 25.85% compared to head (68de8de) 25.83%.

Additional details and impacted files

@@             Coverage Diff              @@
##                2.9     #743      +/-   ##
============================================
- Coverage     25.85%   25.83%   -0.02%     
+ Complexity      940      939       -1     
============================================
  Files           252      252              
  Lines         10753    10753              
  Branches       1198     1198              
============================================
- Hits           2780     2778       -2     
- Misses         7726     7727       +1     
- Partials        247      248       +1     

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[opensearch-trigger-bot]

The backport to 2.11 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-2.11 2.11
# Navigate to the new working tree
cd .worktrees/backport-2.11
# Create a new branch
git switch --create backport/backport-743-to-2.11
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 61909b29210f8d88ce858e9407f6f4a2bf3623bc
# Push it to GitHub
git push --set-upstream origin backport/backport-743-to-2.11
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.11

Then, create a pull request where the base branch is 2.11 and the compare/head branch is backport/backport-743-to-2.11.

[opensearch-trigger-bot]

The backport to 2.7 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-2.7 2.7
# Navigate to the new working tree
cd .worktrees/backport-2.7
# Create a new branch
git switch --create backport/backport-743-to-2.7
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 61909b29210f8d88ce858e9407f6f4a2bf3623bc
# Push it to GitHub
git push --set-upstream origin backport/backport-743-to-2.7
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.7

Then, create a pull request where the base branch is 2.7 and the compare/head branch is backport/backport-743-to-2.7.

[opensearch-trigger-bot]

The backport to 2.6 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-2.6 2.6
# Navigate to the new working tree
cd .worktrees/backport-2.6
# Create a new branch
git switch --create backport/backport-743-to-2.6
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 61909b29210f8d88ce858e9407f6f4a2bf3623bc
# Push it to GitHub
git push --set-upstream origin backport/backport-743-to-2.6
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.6

Then, create a pull request where the base branch is 2.6 and the compare/head branch is backport/backport-743-to-2.6.

[opensearch-trigger-bot]

The backport to 2.5 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-2.5 2.5
# Navigate to the new working tree
cd .worktrees/backport-2.5
# Create a new branch
git switch --create backport/backport-743-to-2.5
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 61909b29210f8d88ce858e9407f6f4a2bf3623bc
# Push it to GitHub
git push --set-upstream origin backport/backport-743-to-2.5
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.5

Then, create a pull request where the base branch is 2.5 and the compare/head branch is backport/backport-743-to-2.5.

[opensearch-trigger-bot]

The backport to 2.8 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-2.8 2.8
# Navigate to the new working tree
cd .worktrees/backport-2.8
# Create a new branch
git switch --create backport/backport-743-to-2.8
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 61909b29210f8d88ce858e9407f6f4a2bf3623bc
# Push it to GitHub
git push --set-upstream origin backport/backport-743-to-2.8
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.8

Then, create a pull request where the base branch is 2.8 and the compare/head branch is backport/backport-743-to-2.8.

[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-743-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 61909b29210f8d88ce858e9407f6f4a2bf3623bc
# Push it to GitHub
git push --set-upstream origin backport/backport-743-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-743-to-2.x.