fix(material/tabs): avoid interrupting click event when scrolling the header #21911
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When a header is scrollable, we scroll a tab into view whenever it receives focus. The problem is that if focus is moved as a result of a mouse/touch event, the tab can be moved out from under the pointer, interrupting the click.
These changes work around the issue by not scrolling the header on mouse/touch focus.
Fixes #21898.