Refine Expression Rubric type (#1698)

[handeyeco]

Summary:

We're trying to make the Rubric type only include the things it needs for scoring. This is Expression.

Issue: LEMS-2462

Test plan:

Nothing should change, just a type tweak.

Author: handeyeco

Reviewers: Myranae

Required Reviewers:

Approved By: Myranae

Checks: ✅ Publish npm snapshot (ubuntu-latest, 20.x), ✅ Check builds for changes in size (ubuntu-latest, 20.x), ✅ Lint, Typecheck, Format, and Test (ubuntu-latest, 20.x), ✅ Check for .changeset entries for all changed files (ubuntu-latest, 20.x), ✅ Cypress (ubuntu-latest, 20.x), ✅ gerald, 🚫 Publish npm snapshot (ubuntu-latest, 20.x), 🚫 Cypress (ubuntu-latest, 20.x), 🚫 Check for .changeset entries for all changed files (ubuntu-latest, 20.x), 🚫 Lint, Typecheck, Format, and Test (ubuntu-latest, 20.x), 🚫 Check builds for changes in size (ubuntu-latest, 20.x), ✅ Publish Storybook to Chromatic (ubuntu-latest, 20.x), ✅ gerald

Pull Request URL: #1698

[khan-actions-bot]

Gerald

Required Reviewers

• @Khan/perseus for changes to .changeset/hot-carrots-eat.md, packages/perseus/src/validation.types.ts

---

Don't want to be involved in this pull request? Comment #removeme and we won't notify you of further changes.

[github-actions]

npm Snapshot: Published

Good news!! We've packaged up the latest commit from this PR (17b5b7f) and published it to npm. You
can install it using the tag PR1698.

Example:

yarn add @khanacademy/perseus@PR1698

If you are working in Khan Academy's webapp, you can run:

./dev/tools/bump_perseus_version.sh -t PR1698

[github-actions]

Size Change: -95 B (-0.01%)

Total Size: 864 kB

Filename	Size	Change
packages/perseus-editor/dist/es/index.js	280 kB	-53 B (-0.02%)
packages/perseus/dist/es/index.js	418 kB	-42 B (-0.01%)

ℹ️ View Unchanged

Filename	Size
packages/kas/dist/es/index.js	38.3 kB
packages/keypad-context/dist/es/index.js	760 B
packages/kmath/dist/es/index.js	4.27 kB
packages/math-input/dist/es/index.js	78 kB
packages/math-input/dist/es/strings.js	1.79 kB
packages/perseus-core/dist/es/index.js	1.48 kB
packages/perseus-linter/dist/es/index.js	22.2 kB
packages/perseus/dist/es/strings.js	3.4 kB
packages/pure-markdown/dist/es/index.js	3.66 kB
packages/simple-markdown/dist/es/index.js	12.4 kB

_{compressed-size-action}

[Myranae]

Thanks for going through this with me earlier! Here's the ticket I added for this: https://khanacademy.atlassian.net/browse/LEMS-2462