Add suppress observer for table vis test

[abbyhu2000]

Description

Add suppress observer for table vis test cigroup2. Also fix the typo in the function name.

Issues Resolved

[List any issues this PR will resolve]

Check List

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[ruanyl]

Approved, but I was thinking, if this error can be safely ignored, shall we add it to one single place so it won't repeat everywhere?

[opensearch-trigger-bot]

The backport to 2.x 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-2.x 2.x
# Navigate to the new working tree
cd .worktrees/backport-2.x
# Create a new branch
git switch --create backport/backport-969-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 73f6db1b968c3c164ef2554851cf8c3bd97e5987
# Push it to GitHub
git push --set-upstream origin backport/backport-969-to-2.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-969-to-2.x.

[ruanyl]

Hi @abbyhu2000, the backport to 2.x has failed, could you backport manually please?