v7 cherry pick: Added secondary text styling

[micahgodbolt]

Cherry-pick from #22200

[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.

Latest deployment of this branch, based on commit 6f552e0:

Sandbox	Source
Fluent UI Button	Configuration
codesandbox-react-template	Configuration

[size-auditor]

Asset size changes

Project	Bundle	Baseline Size	New Size	Difference
office-ui-fabric-react	office-ui-fabric-react-Pickers	282.93 kB	283.052 kB	122 bytes

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

Baseline commit: 219b79b940d240ff28f65c13e0661d0ee11de78f (build)

[fabricteam]

Perf Analysis

No significant results to display.

All results

Scenario	Render type	7.0 Ticks	PR Ticks	Iterations	Status
BaseButton	mount	742	765	5000
Breadcrumb	mount	36030	33994	5000
Checkbox	mount	1303	1269	5000
CheckboxBase	mount	1052	1083	5000
ChoiceGroup	mount	4029	4184	5000
ComboBox	mount	740	710	1000
CommandBar	mount	6547	6631	1000
ContextualMenu	mount	12659	12480	1000
DefaultButton	mount	966	967	5000
DetailsRow	mount	3129	3190	5000
DetailsRowFast	mount	3033	3215	5000
DetailsRowNoStyles	mount	8023	3018	5000
Dialog	mount	1461	1472	1000
DocumentCardTitle	mount	1542	1541	1000
Dropdown	mount	2042	2038	5000
FocusTrapZone	mount	1301	1491	5000
FocusZone	mount	1586	1493	5000
IconButton	mount	1471	1402	5000
Label	mount	283	267	5000
Layer	mount	1628	1592	5000
Link	mount	362	324	5000
MenuButton	mount	1247	1236	5000
MessageBar	mount	1669	1757	5000
Nav	mount	2720	2735	1000
OverflowSet	mount	1200	1173	5000
Panel	mount	1238	1243	1000
Persona	mount	655	687	1000
Pivot	mount	1236	1261	1000
PrimaryButton	mount	1059	1000	5000
Rating	mount	6252	6421	5000
SearchBox	mount	1033	1059	5000
Shimmer	mount	2231	2119	5000
Slider	mount	1240	1286	5000
SpinButton	mount	4124	4253	5000
Spinner	mount	360	358	5000
SplitButton	mount	2683	2700	5000
Stack	mount	426	417	5000
StackWithIntrinsicChildren	mount	1326	1427	5000
StackWithTextChildren	mount	3959	3946	5000
SwatchColorPicker	mount	8651	8891	5000
TagPicker	mount	2392	2393	5000
TeachingBubble	mount	39744	42924	5000
Text	mount	317	363	5000
TextField	mount	1028	1176	5000
Toggle	mount	705	687	5000
button	mount	100	89	5000

[micahgodbolt]

oh fun. unrelated screener failures

[ecraig12345]

oh fun. unrelated screener failures

v7 has been having some screener reliability problems--I think it needs image fixes ported from master.