Implements part of #17712 : Acceptance tests for CUJs in the history tab of the exploration creator.

[Akhilesh-max]

Overview

1. This PR fixes or fixes part of #17712

2. This PR does the following: Adds the acceptance test for the following CUJs in exploration editor section.

   (serial numbers same as testing spreadsheet row number for each user type)

Essential Checklist

Please follow the instructions for making a code change.

• [X] I have linked the issue that this PR fixes in the "Development" section of the sidebar.
• [X] I have checked the "Files Changed" tab and confirmed that the changes are what I want to make.
• [X] I have written tests for my code.
• [X] The PR title starts with "Fix #bugnum: " or "Fix part of #bugnum: ...", followed by a short, clear summary of the changes.
• [X] I have assigned the correct reviewers to this PR (or will leave a comment with the phrase "@{{reviewer_username}} PTAL" if I can't assign them directly).

PR Pointers

• Never force push! If you do, your PR will be closed.
• To reply to reviewers, follow these instructions: https://github.com/oppia/oppia/wiki/Make-a-pull-request#step-5-address-review-comments-until-all-reviewers-approve
• Some e2e tests are flaky, and can fail for reasons unrelated to your PR. We are working on fixing this, but in the meantime, if you need to restart the tests, please check the "If your build fails" wiki page.
• See the Code Owner's wiki page for what code owners will expect.

[oppiabot[bot]]

Hi @Akhilesh-max, can you complete the following:

1. The body of this PR is missing the proof that changes are correct section, please update it to include the section. Thanks!

[oppiabot[bot]]

Hi @Akhilesh-max please assign the required reviewer(s) for this PR. Thanks!

[oppiabot[bot]]

Hi @Akhilesh-max. Due to recent changes in the "develop" branch, this PR now has a merge conflict. Please follow this link if you need help resolving the conflict, so that the PR can be merged. Thanks!

[Akhilesh-max]

@StephenYu2018 PTAL

[oppiabot[bot]]

Unassigning @Akhilesh-max since a re-review was requested. @Akhilesh-max, please make sure you have addressed all review comments. Thanks!

[oppiabot[bot]]

Unassigning @StephenYu2018 since the review is done.

[oppiabot[bot]]

Hi @Akhilesh-max, it looks like some changes were requested on this pull request by @StephenYu2018. PTAL. Thanks!

[Akhilesh-max]

Thanks @StephenYu2018. Addressed all your comments, I am stuck somewhere, as well. Have left a comment.

[oppiabot[bot]]

Assigning @nikitaevg, @U8NWXD for code owner reviews. Thanks!

[oppiabot[bot]]

Unassigning @nikitaevg since they have already approved the PR.

[oppiabot[bot]]

Hi @Akhilesh-max, this PR is ready to be merged. Please address any remaining comments prior to merging, and feel free to merge this PR once the CI checks pass and you're happy with it. Thanks!

[oppiabot[bot]]

Hi @Akhilesh-max. Due to recent changes in the "develop" branch, this PR now has a merge conflict. Please follow this link if you need help resolving the conflict, so that the PR can be merged. Thanks!