Batch 1 of simple default widget option transfers

[handeyeco]

Summary:

I couldn't justify doing a PR per widget because all of these are really straight-forward; there's no prop upgrades or versions or anything. It's just moving "default props" from editors into "default widget options" in core so we can do minor upgrades on the server.

[LEMS-2737/default-collection] matcher
[LEMS-2737/default-collection] interaction
[LEMS-2737/default-collection] input-number
[LEMS-2737/default-collection] image
[LEMS-2737/default-collection] iframe
[LEMS-2737/default-collection] group
[LEMS-2737/default-collection] graded-group
[LEMS-2737/default-collection] explanation
[LEMS-2737/default-collection] dropdown
[LEMS-2737/default-collection] definition
[LEMS-2737/default-collection] cs-program
[LEMS-2737/default-collection] categorizer

Issue: LEMS-2737

Test plan:

Nothing should change, just moving code

[github-actions]

npm Snapshot: Published

Good news!! We've packaged up the latest commit from this PR (d86f5d3) and published it to npm. You
can install it using the tag PR2144.

Example:

yarn add @khanacademy/perseus@PR2144

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

./dev/tools/bump_perseus_version.sh -t PR2144

[github-actions]

Size Change: +719 B (+0.05%)

Total Size: 1.48 MB

Filename	Size	Change
packages/perseus-core/dist/es/index.js	28.9 kB	+1.02 kB (+3.67%)
packages/perseus-editor/dist/es/index.js	688 kB	-304 B (-0.04%)

ℹ️ View Unchanged

Filename	Size
packages/kas/dist/es/index.js	39 kB
packages/keypad-context/dist/es/index.js	760 B
packages/kmath/dist/es/index.js	86.8 kB
packages/math-input/dist/es/index.js	77.6 kB
packages/math-input/dist/es/strings.js	1.79 kB
packages/perseus-linter/dist/es/index.js	22.2 kB
packages/perseus-score/dist/es/index.js	113 kB
packages/perseus/dist/es/index.js	395 kB
packages/perseus/dist/es/strings.js	5.37 kB
packages/pure-markdown/dist/es/index.js	3.66 kB
packages/simple-markdown/dist/es/index.js	12.5 kB

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