Fixed alerting cypress tests.

[AWSHurneyt]

Description

Fixed alerting cypress tests.

Please backport this PR to 2.x, and 2.16.

Testing

The 2 tests updated by this PR are passing on a docker image cluster with security enabled.

Issues Resolved

opensearch-project/alerting-dashboards-plugin#1011

Check List

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[opensearch-trigger-bot]

The backport to 2.15 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-2.15 2.15
# Navigate to the new working tree
cd .worktrees/backport-2.15
# Create a new branch
git switch --create backport/backport-1500-to-2.15
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 5ce06df44fc58ddb303934e71ce8409cccc5cb33
# Push it to GitHub
git push --set-upstream origin backport/backport-1500-to-2.15
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.15

Then, create a pull request where the base branch is 2.15 and the compare/head branch is backport/backport-1500-to-2.15.