Missing coverage: Resizable / Growable (Shared)ArrayBuffers: (Typed)Array.prototype.toLocaleString + (Number|BigInt).prototype.toLocaleString resizes

[marjakh]

Like the various "callbackfn-resize-arraybuffer" tests, e.g., built-ins/Array/prototype/every/callbackfn-resize-arraybuffer, but the resizing happens in Number.prototype.toLocaleString or BigInt.prototype.toLocaleString (which will be invoked repeatedly by toLocaleString when converting the elements to strings.

cc @jugglinmike @syg