Fix include type in Significant Text agg

[pquentin]

Closes #2275

I'm not sure where this should be backported exactly. This aggregation was introduced in Elasticsearch 6.0.

[JoshMock]

I'm not sure where this should be backported exactly. This aggregation was introduced in Elasticsearch 6.0.

Since we're not likely to release any minor/patch versions older than 8.8, we could probably just backport to 8.8, 8.9 and 8.10 for now. For other versions we can probably address on a case-by-case basis so you don't have to open 20 backport PRs. 😆

[github-actions]

The backport to 8.9 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-8.9 8.9
# Navigate to the new working tree
cd .worktrees/backport-8.9
# Create a new branch
git switch --create backport-2279-to-8.9
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick --mainline 1 ca591c5eda691a76bb5456d29637493b9a25b426
# Push it to GitHub
git push --set-upstream origin backport-2279-to-8.9
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-8.9

Then, create a pull request where the base branch is 8.9 and the compare/head branch is backport-2279-to-8.9.

[github-actions]

The backport to 8.8 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-8.8 8.8
# Navigate to the new working tree
cd .worktrees/backport-8.8
# Create a new branch
git switch --create backport-2279-to-8.8
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick --mainline 1 ca591c5eda691a76bb5456d29637493b9a25b426
# Push it to GitHub
git push --set-upstream origin backport-2279-to-8.8
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-8.8

Then, create a pull request where the base branch is 8.8 and the compare/head branch is backport-2279-to-8.8.

[github-actions]

The backport to 7.17 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-7.17 7.17
# Navigate to the new working tree
cd .worktrees/backport-7.17
# Create a new branch
git switch --create backport-2279-to-7.17
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick --mainline 1 ca591c5eda691a76bb5456d29637493b9a25b426
# Push it to GitHub
git push --set-upstream origin backport-2279-to-7.17
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-7.17

Then, create a pull request where the base branch is 7.17 and the compare/head branch is backport-2279-to-7.17.

[pquentin]

Backports:

• [Backport 7.17] Fix include type in Significant Text Agg (#2279) #2292
• [Backport 8.8] Fix include type in Significant Text Agg (#2279) #2291
• [Backport 8.9] Fix include type in Significant Text Agg (#2279) #2290
• [Backport 8.10] Fix include type in Significant Text agg #2285