fix(react-motion): apply initial styles consistently

[layershifter]

Fixes #33812.

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• Fixes issues with styles on initial mount
• Updates unit tests

[github-actions]

📊 Bundle size report

Package & Exports	Baseline (minified/GZIP)	PR	Change
react-accordion Accordion (including children components)	107.018 kB 32.834 kB	106.976 kB 32.812 kB	-42 B -22 B
react-components react-components: Accordion, Button, FluentProvider, Image, Menu, Popover	224.582 kB 64.913 kB	224.54 kB 64.89 kB	-42 B -23 B
react-components react-components: entire library	1.17 MB 292.991 kB	1.17 MB 292.973 kB	-42 B -18 B
react-dialog Dialog (including children components)	100.513 kB 30.131 kB	100.471 kB 30.114 kB	-42 B -17 B
react-motion @fluentui/react-motion - createPresenceComponent()	5.231 kB 2.296 kB	5.189 kB 2.274 kB	-42 B -22 B
react-toast Toast (including Toaster)	101.309 kB 30.521 kB	101.267 kB 30.5 kB	-42 B -21 B
react-tree FlatTree	147.793 kB 42.393 kB	147.751 kB 42.373 kB	-42 B -20 B
react-tree PersonaFlatTree	148.538 kB 42.536 kB	148.496 kB 42.517 kB	-42 B -19 B
react-tree PersonaTree	144.749 kB 41.391 kB	144.707 kB 41.371 kB	-42 B -20 B
react-tree Tree	144.01 kB 41.265 kB	143.968 kB 41.245 kB	-42 B -20 B

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
react-components react-components: Button, FluentProvider & webLightTheme	69.638 kB 20.24 kB
react-components react-components: FluentProvider & webLightTheme	44.473 kB 14.597 kB
react-message-bar MessageBar (all components)	24.882 kB 9.269 kB
react-motion @fluentui/react-motion - createMotionComponent()	4.506 kB 1.967 kB
react-motion @fluentui/react-motion - PresenceGroup	1.714 kB 819 B
react-portal-compat PortalCompatProvider	8.39 kB 2.64 kB
react-timepicker-compat TimePicker	108.551 kB 36.094 kB

_{🤖 This report was generated against dc55108e1ff4d9e1b425c2272341e046d140be95}

[github-actions]

Pull request demo site: URL

[fabricteam]

🕵🏾‍♀️ visual regressions to review in the fluentuiv9 Visual Regression Report

Avatar Converged 2 screenshots

Image Name	Diff(in Pixels)	Image Type
Avatar Converged.Badge Mask RTL.chromium.png	2	Changed
Avatar Converged.badgeMask.chromium.png	5	Changed

Drawer 1 screenshots

Image Name	Diff(in Pixels)	Image Type
Drawer.Full Overlay Dark Mode.chromium.png	988	Changed