test(e2e): add cy commands for storage-browser

[ashwinkumar6]

Description of changes

• Follow up PR to address comment to refactor common cy utils to commands.
• The upload a folder test is also cleaned up to only performed required checks
• Add TS doc string to cypress/support/commands.d.ts

Description of how you validated changes

Tested cypress locally

Checklist

• Have read the Pull Request Guidelines
• PR description included
• yarn test passes and tests are updated/added
• PR title and commit messages follow conventional commit syntax
• If this change should result in a version bump, changeset added (This can be done after creating the PR.) This does not apply to changes made to docs, e2e, examples, or other private packages.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

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[jordanvn]

Info: is there a test for deletion where this logic exists? It seems like it would make sense to have a confirmation that deleted files are then not listed

[ashwinkumar6]

We're testing delete on upload, list, copy and delete a file using toggle menu test. It has a Then I see "All files deleted" step to verify the deletion

[ashwinkumar6]

updated to raise PR from upstream instead of fork