* master: (21 commits)
chore: Migrate react-avatar to use new build (microsoft#24969)
applying package updates
chore(react-input, react-textarea): Deprecating filled with shadow appearance variants (microsoft#24900)
fix: v8 Dropdown no longer sets incorrect and unnecessary aria-activedescendant (microsoft#24593)
feat: v0 Tooltip migration from v9 (microsoft#24908)
chore: bump devDeps to fix critical security vulnerability (microsoft#24891)
Fixing Tree chart issues (microsoft#24752)
init: new package react-avatar-context (microsoft#24968)
ci(.github): add issues write permisions to triage-bot worflow (microsoft#24963)
applying package updates
fix(Toolbar): close previous submenu when opening another submenu (microsoft#24836)
fix: update non-focus-trap Popover role to be group (microsoft#24897)
feat: Avatar's aria label includes 'active' or 'inactive' when using the active prop (microsoft#24901)
feat(scripts): implement triage-bot module (microsoft#24911)
chore: bump @octokit/rest to v18 (microsoft#24919)
stress test: add "build-fixture" command (microsoft#24928)
BREAKING-CHANGE: new ChatMessageContent for style caching (microsoft#24691)
bugfix: fix changefile to properly update version of react-components with a patch (microsoft#24949)
feat(scripts): enable strict checking for additional sub-folders(packages) (microsoft#24526)
chore: exports DialogContent as unstable (microsoft#24943)
...
This PR removes the filled with shadow appearance variants. This is due to the shadow appearances not being visible when used on a background that meets our contrast ratio guidelines.
This is how our current docs show the variants:

To be able to see the shadow, a lighter background is required like this one:

This contradicts our guidelines on using a background with enough contrast ratio for accessibility requirements.