chore(deps): update dependency gradle to v8.4

[mend-for-gitlite.zycloud.tk]

This PR contains the following updates:

Package	Update	Change
gradle (source)	minor	8.3 -> 8.4

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📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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[dblock]

Looks like legit failures in javadoc, https://github.com/opensearch-project/opensearch-sdk-java/actions/runs/6414275491/job/17414414663?pr=950

[dbwiddis]

Looks like legit failures in javadoc, https://github.com/opensearch-project/opensearch-sdk-java/actions/runs/6414275491/job/17414414663?pr=950

Seems related to #951 (and fixed after rebase after that was merged)

[opensearch-trigger-bot]

The backport to 1.x 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/opensearch-sdk-java/backport-1.x 1.x
# Navigate to the new working tree
pushd ../.worktrees/opensearch-sdk-java/backport-1.x
# Create a new branch
git switch --create backport/backport-950-to-1.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 b81fc13a5fe99f28525b9a506185fa6679733e9c
# Push it to GitHub
git push --set-upstream origin backport/backport-950-to-1.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/opensearch-sdk-java/backport-1.x

Then, create a pull request where the base branch is 1.x and the compare/head branch is backport/backport-950-to-1.x.

[dbwiddis]

@owaiskazi19 I seem to recall there was a reason we are keeping older gradle on 1.x. Is this the case or do I need to backport this?

[owaiskazi19]

@owaiskazi19 I seem to recall there was a reason we are keeping older gradle on 1.x. Is this the case or do I need to backport this?

We downgraded gradle to 8.1.1 to match OS 2.9 version here on 1.x.