Cypress v12.8.1 - Fixes for panels/Toast message fix

[TackAdam]

Description

[Describe what this change achieves]
Fixes for cypress testing of panels (with each test creating its own data and cleaning up after itself).
Fixed toast message not appearing on visualization being added to dashboard.

Issues Resolved

[List any issues this PR will resolve]

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.

[TackAdam]

All 29 test reliably passing.

[TackAdam]

Each test will now delete all the saved dashboards and visuals to "cleanup" before executing its testable metric.

[TackAdam]

Toast message for a visual being added to a dashboard was not ever appearing.

[TackAdam]

Each tested feature of a panel should be independent and exclusive to the intended functionality.

[TackAdam]

When adding a visualization to a panel created from code, forcing a refresh ensures that cypress doesn't execute commands before the visual has appeared on the page.

[TackAdam]

Creating objects using .as('object') adds the variable to cypress.
We are then able to access these objects using cy.then(function (){this.});

[codecov]

Codecov Report

Merging #582 (4409b51) into main (4ab8089) will not change coverage.
The diff coverage is n/a.

❗ Current head 4409b51 differs from pull request most recent head 3c51a66. Consider uploading reports for the commit 3c51a66 to get more accurate results

@@           Coverage Diff           @@
##             main     #582   +/-   ##
=======================================
  Coverage   43.12%   43.12%           
=======================================
  Files         303      303           
  Lines       18008    18008           
  Branches     4386     4386           
=======================================
  Hits         7766     7766           
  Misses      10201    10201           
  Partials       41       41           

Flag	Coverage Δ
dashboards-observability	43.12% <ø> (ø)

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[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:

# 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-582-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 14ec8572917e8f101427409fd10bb96627d0ee42
# Push it to GitHub
git push --set-upstream origin backport/backport-582-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-582-to-2.x.