[gtm] Disable overscroll behavior until the mouse scrolling is done

Bug: b/338917100
Change-Id: I00fe4dcff20a43df86b4d037e5f4736f46b0e419
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5618813


Reviewed-by: Toni Barzic <tbarzic@chromium.org>
Commit-Queue: Wen-Chien Wang <wcwang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1313182}