Refactoring var scopes in uploadMinSnapshotsToS3 libs

[peterzhuamazon]

Description

Refactoring var scopes in uploadMinSnapshotsToS3 libs

Issues Resolved

Closes #319

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[codecov]

Codecov Report

Merging #318 (04cd9ca) into main (63eb337) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #318   +/-   ##
=========================================
  Coverage     87.37%   87.37%           
  Complexity       29       29           
=========================================
  Files            80       80           
  Lines           206      206           
  Branches         11       11           
=========================================
  Hits            180      180           
  Misses           19       19           
  Partials          7        7           

Files	Coverage Δ
...ts/jenkins/jobs/uploadMinSnapshotsToS3_Jenkinsfile	100.00% <ø> (ø)

[opensearch-trigger-bot]

The backport to 5.x 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-5.x 5.x
# Navigate to the new working tree
pushd ../.worktrees/backport-5.x
# Create a new branch
git switch --create backport/backport-318-to-5.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 5575d7075690e32a16b04c7c7457ad688176eaad
# Push it to GitHub
git push --set-upstream origin backport/backport-318-to-5.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/backport-5.x

Then, create a pull request where the base branch is 5.x and the compare/head branch is backport/backport-318-to-5.x.