Fix attributes of XLink
Fix attributes of XLink

The attributes were re-defined and didn't have any effect
on the DOM/HTML engine. With this CL the attributes will be set
using `setAttribute`.

Bug: none
Change-Id: I354bb51da18afe4d06e71d62dc38a526149dfec7
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3257264
Reviewed-by: Simon Zünd <38944668e9e2ca98ccd0275b53370f90fa55c113@chromium.org>
Commit-Queue: Alex Rudenko <d8d88e7d7e77f69e23d1d1432231196fb8e02a62@chromium.org>

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