fix: expand button should be disabled when Combobox is disabled

[smhigley]

This is a small semantics-only fix; the functionality to disabled expand/collapse is already there.

Previous Behavior

When the combobox is disabled, the expand/collapse button was not also semantically disabled.

New Behavior

Adds aria-disabled to the button based on the disabled combobox state.

Related Issue(s)

• Fixes ADO issue

[fabricteam]

Perf Analysis (@fluentui/react-components)

Scenario	Render type	Master Ticks	PR Ticks	Iterations	Status
FluentProviderWithTheme	virtual-rerender	33	41	10	Possible regression

All results

Scenario	Render type	Master Ticks	PR Ticks	Iterations	Status
Avatar	mount	631	636	5000
Button	mount	301	303	5000
Field	mount	1115	1165	5000
FluentProvider	mount	700	717	5000
FluentProviderWithTheme	mount	85	87	10
FluentProviderWithTheme	virtual-rerender	33	41	10	Possible regression
FluentProviderWithTheme	virtual-rerender-with-unmount	79	81	10
MakeStyles	mount	863	874	50000
Persona	mount	1770	1698	5000
SpinButton	mount	1365	1367	5000
SwatchPicker	mount	1540	1526	5000

[codesandbox-ci]

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[fabricteam]

📊 Bundle size report

Package & Exports	Baseline (minified/GZIP)	PR	Change
react-combobox Combobox (including child components)	105.556 kB 33.9 kB	105.599 kB 33.902 kB	43 B 2 B
react-components react-components: entire library	1.101 MB 267.271 kB	1.101 MB 267.303 kB	43 B 32 B
react-timepicker-compat TimePicker	107.574 kB 35.25 kB	107.617 kB 35.278 kB	43 B 28 B

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
react-combobox Dropdown (including child components)	107.028 kB 33.875 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-portal-compat PortalCompatProvider	8.39 kB 2.64 kB
react-tag-picker-preview @fluentui/react-tag-picker-preview - package	188.962 kB 55.803 kB

_{🤖 This report was generated against 6533854bc4236dd9070538dc89971a190e6689d3}

[fabricteam]

🕵 fluentuiv9 No visual regressions between this PR and main