Limit the maximum thumbnail canvas width/height, similar to pages (PR 19604 follow-up)

[Snuffleupagus]

The changes in PR #19604 weren't enough for thumbnail canvases in some cases, see e.g. https://web.archive.org/web/20231204152348if_/https://user.informatik.uni-bremen.de/cabo/rfc9000.pdf#pagemode=thumbs

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[nicolo-ribaudo]

These changes look good, but should we the thumbnails also respect maxCanvasPixels?

[Snuffleupagus]

but should we the thumbnails also respect maxCanvasPixels?

Technically yes, however we've (as far as I know) never seen a case where that limit becomes a problem given that thumbnails have a consistent width and that a page would have to be extremely narrow for it to become an issue; note

pdf.js/web/pdf_thumbnail_view.js

Line 32 in 81baa16

const THUMBNAIL_WIDTH = 98; // px

Hence I'd be inclined to defer maxCanvasPixels support in the thumbnail code to another patch, since that's been the case for over a decade without it seemingly breaking anything :-)