ref(tsc): Convert changePlanAction to FC

[isabellaenriquez]

Refs https://github.com/getsentry/frontend-tsc/issues/2

This PR converts changePlanAction to FC along with the following improvements:

• Cleans up tests, particularly those in customerDetails that were testing the modal when those tests should've been in the suite for changePlanAction instead
• One API call to get billing configs as opposed to 4
• Eliminates hardcoding of categories!
• Simplified state management, largely by taking advantage of Forms

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
10063	1	10062	5

View the top 1 failed test(s) by shortest run time

Subscription > PendingChanges renders on-demand to pay-as-you go pending changes for am2 to am3

Stack Traces | 0.023s run time

TestingLibraryElementError: Unable to find an element with the text: Pay-as-you-go budget change from per-category on-demand (errors at $10, performance units at $0, replays at $0, attachments at $0, cron monitors at $0, continuous profile hours at $0, UI profile hours at $0, and uptime monitors at $0) to shared pay-as-you-go of $50. This could be because the text is broken up by multiple elements. In this case, you can provide a function for your text matcher to make your matcher more flexible.

Ignored nodes: comments, script, style
...
    at Object.getElementError (.../sentry/sentry/node_modules/@.../dom/dist/config.js:37:19)
    at .../sentry/sentry/node_modules/@.../dom/dist/query-helpers.js:76:38
    at .../sentry/sentry/node_modules/@.../dom/dist/query-helpers.js:52:17
    at .../sentry/sentry/node_modules/@.../dom/dist/query-helpers.js:95:19
    at Object.<anonymous> (.../views/subscriptionPage/pendingChanges.spec.tsx:396:40)
    at Promise.then.completed (.../sentry/sentry/node_modules/jest-circus/build/utils.js:298:28)
    at new Promise (<anonymous>)
    at callAsyncCircusFn (.../sentry/sentry/node_modules/jest-circus/build/utils.js:231:10)
    at _callCircusTest (.../sentry/sentry/node_modules/jest-circus/build/run.js:316:40)
    at processTicksAndRejections (node:internal/process/task_queues:105:5)
    at _runTest (.../sentry/sentry/node_modules/jest-circus/build/run.js:252:3)
    at _runTestsForDescribeBlock (.../sentry/sentry/node_modules/jest-circus/build/run.js:126:9)
    at _runTestsForDescribeBlock (.../sentry/sentry/node_modules/jest-circus/build/run.js:121:9)
    at run (.../sentry/sentry/node_modules/jest-circus/build/run.js:71:3)
    at runAndTransformResultsToJestFormat (.../sentry/sentry/node_modules/jest-circus/build/legacy-code-todo-rewrite/jestAdapterInit.js:122:21)
    at jestAdapter (.../sentry/sentry/node_modules/jest-circus/build/legacy-code-todo-rewrite/jestAdapter.js:79:19)
    at runTestInternal (.../sentry/sentry/node_modules/jest-runner/build/runTest.js:367:16)
    at runTest (.../sentry/sentry/node_modules/jest-runner/build/runTest.js:444:34)
    at Object.worker (.../sentry/sentry/node_modules/jest-runner/build/testWorker.js:106:12)

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