Added exports for ContextualMenu getItemStyles and getItemClassNames to v8

[GeoffCoxMSFT]

To better support removing deep imports in ODSP.

Changes

• added top-level export of ContextualMenu getItemStyles as getContextualMenuItemStyles
• added top-level export of ContextualMenu getItemClassNames as getContextualMenuItemClassNames

Issues

Updates #24454

To be cherry picked to 7.0 branch.

[codesandbox-ci]

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Latest deployment of this branch, based on commit b04a718:

Sandbox	Source
@fluentui/react 8 starter	Configuration
@fluentui/react-components 9 starter	Configuration

[fabricteam]

📊 Bundle size report

_{🤖 This report was generated against f3104008db3243375c8e3ab0c152adacafab46d0}

[fabricteam]

Perf Analysis (@fluentui/react)

No significant results to display.

All results

Scenario	Render type	Master Ticks	PR Ticks	Iterations	Status
BaseButton	mount	770	752	5000
Breadcrumb	mount	2427	2441	1000
Checkbox	mount	2237	2190	5000
CheckboxBase	mount	1941	1955	5000
ChoiceGroup	mount	3986	3977	5000
ComboBox	mount	829	842	1000
CommandBar	mount	9205	9123	1000
ContextualMenu	mount	10561	10626	1000
DefaultButton	mount	970	961	5000
DetailsRow	mount	3251	3324	5000
DetailsRowFast	mount	3303	3288	5000
DetailsRowNoStyles	mount	3112	3086	5000
Dialog	mount	2731	2773	1000
DocumentCardTitle	mount	146	152	1000
Dropdown	mount	2843	2851	5000
FocusTrapZone	mount	1586	1572	5000
FocusZone	mount	1516	1594	5000
IconButton	mount	1503	1527	5000
Label	mount	304	313	5000
Layer	mount	3936	3874	5000
Link	mount	388	393	5000
MenuButton	mount	1247	1247	5000
MessageBar	mount	1798	1801	5000
Nav	mount	2847	2894	1000
OverflowSet	mount	1257	947	5000
Panel	mount	2154	2145	1000
Persona	mount	842	825	1000
Pivot	mount	1268	1214	1000
PrimaryButton	mount	1085	1110	5000
Rating	mount	6700	6598	5000
SearchBox	mount	1097	1094	5000
Shimmer	mount	2972	3875	5000
Slider	mount	1662	1683	5000
SpinButton	mount	4429	4331	5000
Spinner	mount	379	391	5000
SplitButton	mount	2682	2702	5000
Stack	mount	461	450	5000
StackWithIntrinsicChildren	mount	1962	1908	5000
StackWithTextChildren	mount	4369	4386	5000
SwatchColorPicker	mount	10348	10115	5000
TagPicker	mount	2277	2233	5000
TeachingBubble	mount	86086	86811	5000
Text	mount	357	363	5000
TextField	mount	1197	1166	5000
ThemeProvider	mount	1105	1105	5000
ThemeProvider	virtual-rerender	645	656	5000
ThemeProvider	virtual-rerender-with-unmount	1730	1747	5000
Toggle	mount	694	716	5000
buttonNative	mount	119	105	5000

[size-auditor]

Asset size changes

Project	Bundle	Baseline Size	New Size	Difference
office-ui-fabric-react	fluentui-react-ContextualMenu	145.352 kB	145.456 kB	104 bytes

 Over Tolerance (1024 B)  Over Baseline  Below Baseline  New   Removed 1 kB = 1000 B

Baseline commit: f3104008db3243375c8e3ab0c152adacafab46d0 (build)