RTTR: Prevent warn log in test

[satelllte]

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The change prevents console.warn output log pollution, as well as covers it with test.

Example of log from the latest run in master branch:

PASS packages/test-renderer/src/__tests__/RTTR.events.test.tsx
  ● Console

    console.warn
      Handler for onPointerUp was not found. You must pass event names in camelCase or name of the handler https://github.com/pmndrs/react-three-fiber/blob/master/packages/test-renderer/markdown/rttr.md#create-fireevent

      28 |     }
      29 |
    > 30 |     console.warn(
         |             ^
      31 |       `Handler for ${eventName} was not found. You must pass event names in camelCase or name of the handler https://github.com/pmndrs/react-three-fiber/blob/master/packages/test-renderer/markdown/rttr.md#create-fireevent`,
      32 |     )
      33 |

      at findEventHandler (packages/test-renderer/src/fireEvent.ts:30:13)
      at packages/test-renderer/src/fireEvent.ts:50:[21](https://github.com/pmndrs/react-three-fiber/actions/runs/7630812513/job/20787324972#step:8:22)
      at packages/test-renderer/src/fireEvent.ts:1320:39
      at Object.<anonymous>.__awaiter (packages/test-renderer/src/fireEvent.ts:1269:10)
      at invokeEvent (packages/test-renderer/src/fireEvent.ts:49:119)
      at packages/test-renderer/src/fireEvent.ts:69:28
      at packages/test-renderer/src/fireEvent.ts:1320:39
      at Object.<anonymous>.__awaiter (packages/test-renderer/src/fireEvent.ts:1269:10)
      at fireEvent (packages/test-renderer/src/fireEvent.ts:69:21)
      at packages/test-renderer/src/__tests__/RTTR.events.test.tsx:53:30
      at packages/test-renderer/src/__tests__/RTTR.events.test.tsx:31:71
      at Object.<anonymous>.__awaiter (packages/test-renderer/src/__tests__/RTTR.events.test.tsx:27:12)
      at packages/test-renderer/src/__tests__/RTTR.events.test.tsx:53:[23](https://github.com/pmndrs/react-three-fiber/actions/runs/7630812513/job/20787324972#step:8:24)
      at Object.<anonymous> (node_modules/expect/build/toThrowMatchers.js:83:11)
      at Object.throwingMatcher [as toThrow] (node_modules/expect/build/index.js:382:21)
      at packages/test-renderer/src/__tests__/RTTR.events.test.tsx:53:79
      at fulfilled (packages/test-renderer/src/__tests__/RTTR.events.test.tsx:[28](https://github.com/pmndrs/react-three-fiber/actions/runs/7630812513/job/20787324972#step:8:29):58)

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[CodyJasonBennett]

Thanks. Have been looking for this, apparently I never merged your PR.