Change shared addon component tests to accommodate tests for CI minutes

What does this MR do and why?

This is the first step towards moving addon related data to GraphQL and comprises of changing the current tests for BuyAddonsApp to accommodate new tests for minutes.

Currently the tests for BuyAddonsApp are around Storage only.

With this MR:

• We remove the default response (mockCiMinutesPlans) for plansQueryMock in createMockApolloProvider. This lets us be explicit about what mock data is being passed when invoking createMockApolloProvider which will be useful when we add tests for CI Minutes.
• We make createComponent accept an additional argument called propsData through which we can pass props for both Storage and CI Minutes when creating respective components

Screenshots or screen recordings

The changes in this MR are purely test related and the implementation is unchanged.

How to set up and validate locally

Test suite that's affected by this change is ee/spec/frontend/subscriptions/buy_addons_shared/app_spec.js

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #346620 (closed)