[EuiCodeBlock] Virtualization doesn't calculate correctly long tokens that break into a new line

[miukimiu]

Found this bug while doing a review for #4993.

When the virtualization is set to true and a very long token breaks into a new line the text gets overlapped. The second example uses isVirtualized:

Here's a CodeSandbox with the issue: https://codesandbox.io/s/code-block-isvirtualized-issue-t6cvt?file=/index.js.

[thompsongl]

Just noting that the resolution here was to prohibit virtualized rendering and line wrapping: #5379 (review)