Bug 1598284 [wpt PR 20358] - Use spread syntax in WebIDL/current-realm.html., a=testonly

Bug 1598284 [wpt PR 20358] - Use spread syntax in WebIDL/current-realm.html., a=testonly

Automatic update from web-platform-tests
Use spread syntax in WebIDL/current-realm.html. (#20358)

In [1], it is reported that Chrome is failing the test calling
`CanvasRenderingContext2D.createImageData()` with

    FAIL message: Failed to execute 'createImageData' on
    'CanvasRenderingContext2D': The provided value is not of type
    '(Uint8ClampedArray or Uint16Array or Float32Array)'

which happens because Chrome implements [2], which introduces a 4-argument
`createImageData()` overload. This overload ends up being used by the test
due to the following call:

    CanvasRenderingContext2D.createImageData(5, 5, undefined, undefined)

Avoid passing a constant number of arguments when we are testing multiple
calls that take a variable number of arguments by using the spread syntax
instead.

[1] https://wpt.fyi/results/WebIDL/current-realm.html?run_id=353010001&run_id=376180001&run_id=381940001&run_id=376170001
[2] https://github.com/WICG/canvas-color-space/
--

wpt-commits: 6ac023bb7f669cb9be340e1c184dfd4d4226e661
wpt-pr: 20358