Fixing string format change

[MitchellGale]

Description

Fix changes in regards to this PR opensearch-project/OpenSearch#9127 with breaking changes.

Changes imports to include new path inside core. Update calls to toString.

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

Merging #1943 (4f7547c) into main (d144706) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main    #1943   +/-   ##
=========================================
  Coverage     97.42%   97.42%           
  Complexity     4647     4647           
=========================================
  Files           408      408           
  Lines         11526    11526           
  Branches        839      839           
=========================================
  Hits          11229    11229           
  Misses          290      290           
  Partials          7        7           

Flag	Coverage Δ
sql-engine	97.42% <ø> (ø)

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[acarbonetto]

LGTM

[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/sql/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/sql/backport-2.x
# Create a new branch
git switch --create backport/backport-1943-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 88f36bd4ee38a8a6c233eb0677d664a1ebe92c88
# Push it to GitHub
git push --set-upstream origin backport/backport-1943-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/sql/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-1943-to-2.x.