fix: Remove MenuItem focus on hover

[ling1726]

In order to be consistent with Combobox/Dropdown/TagPicker on hover/focused states - this PR removes the behaviour of Menu where items are focused on hover even though this seems to be the prevailing pattern with the ARIA working group https://www.w3.org/WAI/ARIA/apg/patterns/menubar/examples/menubar-editor/

[github-actions]

📊 Bundle size report

Package & Exports	Baseline (minified/GZIP)	PR	Change
react-components react-components: Accordion, Button, FluentProvider, Image, Menu, Popover	222.703 kB 64.42 kB	222.577 kB 64.396 kB	-126 B -24 B
react-components react-components: entire library	1.164 MB 291.227 kB	1.164 MB 291.205 kB	-127 B -22 B
react-menu Menu (including children components)	154.048 kB 46.506 kB	153.921 kB 46.481 kB	-127 B -25 B
react-menu Menu (including selectable components)	156.729 kB 46.992 kB	156.602 kB 46.968 kB	-127 B -24 B

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
react-avatar Avatar	49.303 kB 15.815 kB
react-avatar AvatarGroup	20.106 kB 7.968 kB
react-avatar AvatarGroupItem	63.447 kB 20.034 kB
react-breadcrumb @fluentui/react-breadcrumb - package	114.291 kB 31.695 kB
react-components react-components: Button, FluentProvider & webLightTheme	69.21 kB 20.174 kB
react-components react-components: FluentProvider & webLightTheme	44.447 kB 14.59 kB
react-datepicker-compat DatePicker Compat	225.318 kB 63.786 kB
react-dialog Dialog (including children components)	100.417 kB 30.097 kB
react-overflow hooks only	12.808 kB 4.819 kB
react-persona Persona	56.194 kB 17.695 kB
react-popover Popover	130.294 kB 40.69 kB
react-portal-compat PortalCompatProvider	8.39 kB 2.64 kB
react-table DataGrid	161.034 kB 45.71 kB
react-table Table (Primitives only)	42.666 kB 13.854 kB
react-table Table as DataGrid	131.869 kB 36.57 kB
react-table Table (Selection only)	70.536 kB 19.999 kB
react-table Table (Sort only)	69.179 kB 19.61 kB
react-tag-picker @fluentui/react-tag-picker - package	185.227 kB 55.684 kB
react-tags InteractionTag	15.199 kB 6.157 kB
react-tags Tag	29.072 kB 9.55 kB
react-tags TagGroup	82.719 kB 24.524 kB
react-teaching-popover TeachingPopover	91.711 kB 27.921 kB
react-timepicker-compat TimePicker	108.525 kB 36.087 kB
react-tree FlatTree	145.462 kB 41.771 kB
react-tree PersonaFlatTree	146.15 kB 41.881 kB
react-tree PersonaTree	142.381 kB 40.703 kB
react-tree Tree	141.693 kB 40.602 kB

_{🤖 This report was generated against 384df0ccb4a5324da6daee8f18712ef5a81fa05a}

[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	4	Changed
Avatar Converged.badgeMask.chromium.png	16	Changed