Pass onRenderItem to onRenderContainer in the Dropdown component

[alice-ep]

Current Behavior

When attempting to use onRenderList with Dropdown, it is impossible to invoke onRenderItem from the props as it's not set. This was handled in ComboBox in a similar fashion but hasn't happened in Dropdown yet.

New Behavior

onRenderItem (default or custom, if set) is passed onRenderContainer, so now it is possible to invoke it through props for both onRenderList and onRenderContainer, similar to what is done in ComboBox.

Related Issue(s)

Fixes #12919, #3050

[size-auditor]

Asset size changes

Project	Bundle	Baseline Size	New Size	Difference
office-ui-fabric-react	fluentui-react-Dropdown	220.233 kB	220.299 kB	66 bytes

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

Baseline commit: eff4a290cbb0ca8fd7023be1e46b2719564743e6 (build)

[codesandbox-ci]

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Latest deployment of this branch, based on commit 77a64b1:

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

[fabricteam]

📊 Bundle size report

_{🤖 This report was generated against eff4a290cbb0ca8fd7023be1e46b2719564743e6}

[fabricteam]

Perf Analysis (@fluentui/react)

No significant results to display.

All results

Scenario	Render type	Master Ticks	PR Ticks	Iterations	Status
BaseButton	mount	1225	1198	5000
Breadcrumb	mount	2831	2819	1000
Checkbox	mount	2676	2655	5000
CheckboxBase	mount	2388	2396	5000
ChoiceGroup	mount	4251	4262	5000
ComboBox	mount	1176	1157	1000
CommandBar	mount	9435	9393	1000
ContextualMenu	mount	10759	10237	1000
DefaultButton	mount	1374	1361	5000
DetailsRow	mount	3368	3361	5000
DetailsRowFast	mount	3428	3357	5000
DetailsRowNoStyles	mount	3213	3289	5000
Dialog	mount	2965	2960	1000
DocumentCardTitle	mount	591	580	1000
Dropdown	mount	3191	3177	5000
FocusTrapZone	mount	1947	1960	5000
FocusZone	mount	1963	1948	5000
GroupedList	mount	48591	54643	2
GroupedList	virtual-rerender	23724	23457	2
GroupedList	virtual-rerender-with-unmount	83188	82891	2
GroupedListV2	mount	564	551	2
GroupedListV2	virtual-rerender	525	529	2
GroupedListV2	virtual-rerender-with-unmount	568	574	2
IconButton	mount	1796	1820	5000
Label	mount	747	757	5000
Layer	mount	4149	4138	5000
Link	mount	860	872	5000
MenuButton	mount	1625	1624	5000
MessageBar	mount	2321	2338	5000
Nav	mount	3112	3101	1000
OverflowSet	mount	1444	1416	5000
Panel	mount	2522	2515	1000
Persona	mount	1240	1239	1000
Pivot	mount	1538	1521	1000
PrimaryButton	mount	1498	1491	5000
Rating	mount	7080	6986	5000
SearchBox	mount	1525	1528	5000
Shimmer	mount	2954	2945	5000
Slider	mount	2122	2114	5000
SpinButton	mount	4301	4296	5000
Spinner	mount	826	820	5000
SplitButton	mount	2848	2855	5000
Stack	mount	906	906	5000
StackWithIntrinsicChildren	mount	2263	2255	5000
StackWithTextChildren	mount	4974	4954	5000
SwatchColorPicker	mount	9585	9538	5000
TagPicker	mount	2338	2387	5000
TeachingBubble	mount	78718	78887	5000
Text	mount	823	833	5000
TextField	mount	1549	1554	5000
ThemeProvider	mount	1432	1463	5000
ThemeProvider	virtual-rerender	1146	1148	5000
ThemeProvider	virtual-rerender-with-unmount	1998	2015	5000
Toggle	mount	1135	1141	5000
buttonNative	mount	540	537	5000