feat: Support lists in expressions

[TomasEng]

Description

This pull request adds list support to our expression language in frontend. This includes the following:

• A list function that creates a list
• Recognising arrays as valid types
• Allowing the dataModel function to return a list

Related Issue(s)

• Support lists in expressions #4189

Verification/QA

• Manual functionality testing
  • I have tested these changes manually
• Automated tests
  • Unit test(s) have been added/updated
• UU/WCAG (follow these guidelines until we have our own)
  • No testing done/necessary (no DOM/visual changes)
• User documentation @ altinn-studio-docs
  • Has been added/updated: Add docs about lists and objects in expressions altinn-studio-docs#2894
• Support in Altinn Studio
  • Issue(s) created for support in Studio: The JSON Schema in the expression editor must be updated. This is a part of Support lists in expressions #4189.
• Sprint board
  • The original issue (or this PR itself) has been added to the Team Apps project and to the current sprint board
• Labels
  • I have added a kind/* and backport* label to this PR for proper release notes grouping

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 19be23cc-1e32-4d6b-8402-2202e597e478

📥 Commits

Reviewing files that changed from the base of the PR and between 589669d and 2bcb9be.

📒 Files selected for processing (9)

• schemas/json/layout/expression.schema.v1.json
• src/codegen/dataTypes/GenerateExpressionOr.ts
• src/features/expressions/expression-functions.ts
• src/features/expressions/index.ts
• src/features/expressions/shared-tests/functions/dataModel/array-is-null.json
• src/features/expressions/shared-tests/functions/dataModel/lookup-list.json
• src/features/expressions/shared-tests/functions/list/list.json
• src/features/expressions/types.ts
• src/features/expressions/validation.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch support-lists-in-expressions

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
91.7% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[TomasEng]

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