test: create MCP

[andreaskienle]

This PR adds tests to the create MCP flow:

• Offloads creation logic to useCreateManagedControlPlane with dedicated tests
• Mocks this hook in CreateManagedControlPlaneWizardContainer with dedicated tests

It also adds some helper utils which can be used in similar tests:

• deepEqualJson Command for cypress
• assertNonNullish and assertString vor vitest

[Copilot]

Pull Request Overview

This PR introduces a new custom hook useCreateManagedControlPlane to handle the creation of Managed Control Planes, along with comprehensive test coverage and dependency injection support for improved testability.

Key Changes

• Created useCreateManagedControlPlane hook to encapsulate MCP creation logic
• Added unit tests for the new hook using Vitest
• Implemented Cypress component tests for the wizard container with dependency injection
• Introduced test utilities for type assertions in test files

Reviewed Changes

Copilot reviewed 6 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/utils/test/vitest-utils.ts	New test utility functions for type assertions in Vitest tests
src/hooks/useCreateManagedControlPlane.tsx	New hook abstracting MCP creation mutation logic
src/hooks/useCreateManagedControlPlane.spec.ts	Unit tests validating the hook's request handling
src/components/Wizards/CreateManagedControlPlane/CreateManagedControlPlaneWizardContainer.tsx	Integrated new hook with dependency injection for testability
src/components/Wizards/CreateManagedControlPlane/CreateManagedControlPlaneWizardContainer.cy.tsx	Cypress component test for end-to-end wizard flow
cypress/support/commands.ts	Added custom Cypress command for deep JSON equality assertions

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[Hubert-Szczepanski-SAP]

Really good job with find a good way to test our components!