Add tests for QueuingStrategy size function prototype, constructibility

[ninevra]

Adds four test cases asserting that the size functions associated with streams' ByteLengthQueuingStrategy and CountQueuingStrategy functions do not have prototype properties and cannot be constructed.

PR requested by @ricea in whatwg/streams#1142 (comment).

I believe this to be spec-required and major-implementation-compliant:

new ByteLengthQueuingStrategy({ highWaterMark: 100 }).size.prototype

gives undefined in Chrome and Firefox. The Streams spec calls CreateBuiltinFunction without calling MakeConstructor, which is the abstract op that adds the prototype property. So it would appear that we should in fact use arrow functions after all

Originally posted by @TimothyGu in jsdom/jsdom#3200 (comment)