INT-3303: Update Vue integration tests to use BDD style.

[kemister85]

Ticket: INT-3303

Changes:

• fixed existing console error in Storybook for Editor.stories as it was set to an array, but expected string.

• renamed cRender to pRender and updated to use Promise.

• removed Chain.op from all tests.

• moved cleanupTinymce to alien/TestHelper.ts and renamed to cleanupGlobalTinymce to be clearer.

• created VAILID_API_KEY variable to use string interpolation for replacing api-key="a-fake-api-key".

• converted all tests to use describe, it conventions.

• updated InitTest.ts to iterate over Arr.each to isolate each test run for editor major versions.

• [x] Test yarn build

• [x] Test yarn storybook

• [x] Test yarn test-manual

[kemister85]

Special thanks to @tiny-ben-tran for his time/guidance and assistance in helping me with this PR.