fix(OverflowItem): properly propagate refs to child elements

[layershifter]

New Behavior

• Fixes ref forwarding in a scenario when *Trigger components are used (adds .isFluentTriggerComponent)
• Fixes refs on child elements (calls child.ref)
• New tests have been added

Related Issue(s)

Fixes #31346

[fabricteam]

Perf Analysis (@fluentui/react-components)

No significant results to display.

All results

Scenario	Render type	Master Ticks	PR Ticks	Iterations	Status
Avatar	mount	631	623	5000
Button	mount	307	304	5000
Field	mount	1144	1104	5000
FluentProvider	mount	698	715	5000
FluentProviderWithTheme	mount	80	82	10
FluentProviderWithTheme	virtual-rerender	37	41	10
FluentProviderWithTheme	virtual-rerender-with-unmount	73	79	10
MakeStyles	mount	857	858	50000
Persona	mount	1765	1750	5000
SpinButton	mount	1395	1405	5000
SwatchPicker	mount	1520	1555	5000

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

[fabricteam]

📊 Bundle size report

Package & Exports	Baseline (minified/GZIP)	PR	Change
react-components react-components: entire library	1.139 MB 275.337 kB	1.139 MB 275.371 kB	89 B 34 B

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
react-breadcrumb @fluentui/react-breadcrumb - package	117.263 kB 32.241 kB
react-components react-components: Button, FluentProvider & webLightTheme	71.55 kB 20.584 kB
react-components react-components: Accordion, Button, FluentProvider, Image, Menu, Popover	221.825 kB 62.568 kB
react-components react-components: FluentProvider & webLightTheme	44.037 kB 14.418 kB
react-overflow hooks only	12.87 kB 4.83 kB
react-portal-compat PortalCompatProvider	8.39 kB 2.64 kB

_{🤖 This report was generated against bf854a4b7ba1ac057f57a21527cf1d0240c14d9b}

[fabricteam]

🕵 fluentuiv9 No visual regressions between this PR and main