Add path.repo for registering snapshot repository in integ tests

[anntians]

Description

A prior PR #2445 was breaking the release build of 2.19 due to #2458. This PR fixes the issue by updating the path.repo used to register snapshot repositories in integ tests

Related Issues

Resolves #2458

Check List

• New functionality includes testing.
• New functionality has been documented.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff.
• Public documentation issue/PR created.

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[anntians]

This PR is a fix for a previous PR #2445. Can I get help with adding the skip-changelog label to this PR. Thanks

[shatejas]

Looks good, waiting for CI runs to approve

[anntians]

Can I get help adding a backport main label to this PR? Thanks

[opensearch-trigger-bot]

The backport to main 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-main main
# Navigate to the new working tree
cd .worktrees/backport-main
# Create a new branch
git switch --create backport/backport-2461-to-main
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 168ee3cd30319d6bedbf3fe43580af745ae7dcb4
# Push it to GitHub
git push --set-upstream origin backport/backport-2461-to-main
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-main

Then, create a pull request where the base branch is main and the compare/head branch is backport/backport-2461-to-main.