Change first instances of data prepper to open search data prepper

[natebower]

Description

Changes all first instances of "Data Prepper" to "OpenSearch Data Prepper"

Version

2.18

Checklist

• By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and subject to the Developers Certificate of Origin.
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[github-actions]

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[dlvenable]

NIce!

I think there are a few other places as well:

documentation-website/_data/top_nav.yml

Line 60 in 8664051

- label: Data Prepper

documentation-website/_config.yml

Line 243 in 8664051

section-name: "Data Prepper"

[kolchfa-aws]

Changed config.yml but top_nav.yml can stay the same. This is for top menu, and we use shortcuts there like "Benchmark"

[kolchfa-aws]

LGTM

[opensearch-trigger-bot]

The backport to 2.18 failed:

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

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-2.18 2.18
# Navigate to the new working tree
pushd ../.worktrees/backport-2.18
# Create a new branch
git switch --create backport/backport-9091-to-2.18
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 d0fc2493cdeab0ea8679f7c6f5456d810c79b464
# Push it to GitHub
git push --set-upstream origin backport/backport-9091-to-2.18
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/backport-2.18

Then, create a pull request where the base branch is 2.18 and the compare/head branch is backport/backport-9091-to-2.18.