fix: floating ui on combobutton

[riddhybansal]

Closes #16540

This PR enhances ComboButton experimental autoAlign functionality to automatically position the floating element to be within view, even on scroll.

This uses floating-ui and relies solely on the fixed strategy, using position: fixed on the floating element. In the majority of cases, ComboButton floating elements will no longer be clipped by parents with overflow: hidden.

Changed

• Use floating-ui for positioning floating element.
• Feed floating-ui the values of ComboButton custom properties (flip,size) when possible.

Removed

• Sending X and Y coordinates for the floating element (Menu) from ComboButton. All the calculations like width of floating element , X and Y positions are calculated by floating UI itself.

Testing / Reviewing

• View the ComboButton stories, there is autoalign experiment story in there. Ensure it works as intended and there's no regressions.
• Make sure that the menu does not detach itself from ComboButton when you scroll.

[netlify]

✅ Deploy Preview for v11-carbon-react ready!

Built without sensitive environment variables

Name	Link
🔨 Latest commit	53397bc
🔍 Latest deploy log	https://app.netlify.com/sites/v11-carbon-react/deploys/6655c94314c0ea0008fea9f6
😎 Deploy Preview	https://deploy-preview-16586--v11-carbon-react.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[netlify]

✅ Deploy Preview for carbon-elements ready!

Name	Link
🔨 Latest commit	53397bc
🔍 Latest deploy log	https://app.netlify.com/sites/carbon-elements/deploys/6655c943f0a03e00086c8c23
😎 Deploy Preview	https://deploy-preview-16586--carbon-elements.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[guidari]

Awesome! LGTM! 🚀

[alisonjoseph]

LGTM!