[reader mode] Fix copy functionality for chrome-distiller URLs

We do not want to be copying the chrome-distiller URL, but the original
URL. Also modifies the displayText within the suggestion to be the
original URL and ensures the edit functionality does not paste in the
chrome-distiller URL.

Screen recording of updated behaviour:
http://screencast/cast/NjY1MTgwMzkzMTI0NjU5MnwzYzE5MjM0Zi05Mw

Bug: 425686092
Change-Id: I6bfeeb03b295faae5e871dc65c1bc6e271e2f450
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6761313
Commit-Queue: Evan Luo <evanluo@google.com>
Reviewed-by: Tomasz Wiszkowski <ender@google.com>
Reviewed-by: Brandon Wylie <wylieb@google.com>
Cr-Commit-Position: refs/heads/main@{#1490450}