Renaming jupyter notebook functions

[soheegoo]

Proposed Changes

(Describe your changes here. Also describe the motivation for your changes: what problem do they solve, or how do they improve the application or codebase? If this pull request fixes an open issue, use a keyword to link this pull request to the issue.)

Refactored function and file names used for displaying the HTML content of Jupyter Notebook submission files. Previously, the naming was specific to notebooks, but now it is generalized to reflect that these functions/files are used to display previews of HTML content for any files converted to HTML. This change expands the scope of these functions to also support HTML previews of RMarkdown files (PR #7390).

...

Screenshots of your changes (if applicable)

Associated documentation repository pull request (if applicable)

Type of Change

(Write an X or a brief description next to the type or types that best describe your changes.)

Type	Applies?
🚨 Breaking change (fix or feature that would cause existing functionality to change)
✨ New feature (non-breaking change that adds functionality)
🐛 Bug fix (non-breaking change that fixes an issue)
🎨 User interface change (change to user interface; provide screenshots)
♻️ Refactoring (internal change to codebase, without changing functionality)	X
🚦 Test update (change that only adds or modifies tests)
📦 Dependency update (change that updates a dependency)
🔧 Internal (change that only affects developers or continuous integration)

Checklist

(Complete each of the following items for your pull request. Indicate that you have completed an item by changing the [ ] into a [x] in the raw text, or by clicking on the checkbox in the rendered description on GitHub.)

Before opening your pull request:

• I have performed a self-review of my changes.
  • Check that all changed files included in this pull request are intentional changes.
  • Check that all changes are relevant to the purpose of this pull request, as described above.
• I have added tests for my changes, if applicable.
  • This is required for all bug fixes and new features.
• I have updated the project documentation, if applicable.
  • This is required for new features.
• If this is my first contribution, I have added myself to the list of contributors.

After opening your pull request:

• I have updated the project Changelog (this is required for all changes).
• I have verified that the pre-commit.ci checks have passed.
• I have verified that the CI tests have passed.
• I have reviewed the test coverage changes reported by Coveralls.
• I have requested a review from a project maintainer.

Questions and Comments

(Include any questions or comments you have regarding your changes.)

[coveralls]

Pull Request Test Coverage Report for Build 12981929356

Details

• 32 of 34 (94.12%) changed or added relevant lines in 7 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 91.87%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
app/javascript/Components/Result/file_viewer.jsx	0	1	0.0%
app/javascript/Components/Result/html_viewer.jsx	0	1	0.0%

Totals
Change from base Build 12966565418:	0.0%
Covered Lines:	41290
Relevant Lines:	44262

---

💛 - Coveralls

[david-yz-liu]

@soheegoo this looks great, thanks! I just left two minor comments