[Remote Store] Upload translog checkpoint as object metadata to translog

[skumawat2025]

Previous PR link: #13272

Description

This PR is a sub task of feature request #13022. And is being tracked here #13091.

This PR include below changes -

1. We introduced a new key (translog-metadata) in remote store custom metadata for new indices.
2. For the indices having translog-metadata as true, the translog.ckp file's data is now stored as object metadata associated with the translog.tlog file when uploading to an S3 remote storage.
3. We will make only one download calls for translog.tlog file with it's metadata to recover translog files for a generation.
4. Handling of translog file deletion calls.

Related Issues

Resolves #13094

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Failing checks are inspected and point to the corresponding known issue(s) (See: Troubleshooting Failing Builds)
• Commits are signed per the DCO using --signoff
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)
• Public documentation issue/PR created

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[github-actions]

❌ Gradle check result for c20ae47: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for 6724043: FAILURE

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[github-actions]

❌ Gradle check result for b07035e: FAILURE

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[github-actions]

❌ Gradle check result for fc368da: FAILURE

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[github-actions]

❌ Gradle check result for 7586b7d: FAILURE

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[opensearch-trigger-bot]

The backport to 2.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/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-2.x
# Create a new branch
git switch --create backport/backport-13637-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 76e2a5d9d70ab310033f33151fdaa0ab68c6537e
# Push it to GitHub
git push --set-upstream origin backport/backport-13637-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-13637-to-2.x.