Show all related docs for a finding

[amsiglan]

Description

Currently we only show on document for a finding in the flyout since the assumption was we only trigger a finding on one doc but with the introduction of aggregation rules support, we can now have a bucket of documents in a single finding. This PR updates the Finding flyout to show all the documents.

Existing UX:

Proposed UX:

Check List

• Commits are signed per the DCO using --signoff

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[opensearch-trigger-bot]

The backport to 2.11 failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/security-analytics-dashboards-plugin/backport-2.11 2.11
# Navigate to the new working tree
pushd ../.worktrees/security-analytics-dashboards-plugin/backport-2.11
# Create a new branch
git switch --create backport-1006-to-2.11
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 e16e1aaffe5bf207070a5d88e85daace6aca2707
# Push it to GitHub
git push --set-upstream origin backport-1006-to-2.11
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/security-analytics-dashboards-plugin/backport-2.11

Then, create a pull request where the base branch is 2.11 and the compare/head branch is backport-1006-to-2.11.