fix(dom): reset auto scroller state on cleanup

[wanxiankai]

Summary

• reset the shared Scroller.autoScrolling flag when AutoScroller cleans up its interval
• add a regression test for AutoScroller cleanup
• add a patch changeset for @dnd-kit/dom

Closes #2072.

Testing

• ./node_modules/.bin/prettier --check packages/dom/src/core/plugins/scrolling/AutoScroller.ts packages/dom/tests/auto-scroller.test.ts .changeset/quiet-scrolls-stop.md
• ./node_modules/.bin/tsc packages/dom/tests/auto-scroller.test.ts --noEmit --target es6 --module NodeNext --moduleResolution NodeNext --lib dom,dom.iterable,ES2015 --allowImportingTsExtensions --isolatedModules --strict --skipLibCheck --types bun-types

Note: I could not run bun test locally because bun is not installed in this environment.

[changeset-bot]

🦋 Changeset detected

Latest commit: 9055a69

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 10 packages

Name	Type
@dnd-kit/dom	Patch
@dnd-kit/abstract	Patch
@dnd-kit/collision	Patch
@dnd-kit/geometry	Patch
@dnd-kit/helpers	Patch
@dnd-kit/react	Patch
@dnd-kit/state	Patch
@dnd-kit/vue	Patch
@dnd-kit/solid	Patch
@dnd-kit/svelte	Patch

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