[flow] Upgrade from 0.282 -> 0.286

[poteto]

Flow 0.286 introduced stricter constant-condition detection that flags build-time feature flags (supportsMutation, supportsHydration, isPrimaryRenderer, enableProfiling, etc.) and narrowed null checks. Added inline $FlowFixMe suppressions to preserve existing runtime behavior.

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Stack created with Sapling. Best reviewed with ReviewStack.

• #35334
• #35333
• -> #35332
• #35331
• #35330
• #35329

[react-sizebot]

Comparing: 55480b4d228986e502f4651f8e53a6f264a1858e...bb9c93e47971ba079d525212fb17cfe9a1cceb01

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.js	=	6.84 kB	6.84 kB	=	1.88 kB	1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	608.36 kB	608.36 kB	=	107.68 kB	107.68 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.84 kB	6.84 kB	=	1.88 kB	1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	667.47 kB	667.47 kB	=	117.57 kB	117.57 kB
facebook-www/ReactDOM-prod.classic.js	=	693.67 kB	693.67 kB	=	122.07 kB	122.06 kB
facebook-www/ReactDOM-prod.modern.js	=	684.10 kB	684.10 kB	=	120.45 kB	120.45 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-experimental/react-server-dom-webpack/esm/react-server-dom-webpack-node-loader.production.js	+0.33%	20.07 kB	20.13 kB	+0.59%	4.93 kB	4.96 kB
oss-stable-semver/react-server-dom-webpack/esm/react-server-dom-webpack-node-loader.production.js	+0.33%	20.07 kB	20.13 kB	+0.59%	4.93 kB	4.96 kB
oss-stable/react-server-dom-webpack/esm/react-server-dom-webpack-node-loader.production.js	+0.33%	20.07 kB	20.13 kB	+0.59%	4.93 kB	4.96 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js	+0.32%	96.61 kB	96.92 kB	+0.20%	19.92 kB	19.96 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js	+0.32%	96.61 kB	96.92 kB	+0.20%	19.92 kB	19.96 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.production.js	+0.32%	96.61 kB	96.92 kB	+0.20%	19.92 kB	19.96 kB
oss-stable-semver/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js	+0.22%	228.09 kB	228.60 kB	+0.14%	50.49 kB	50.56 kB
oss-stable/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js	+0.22%	228.12 kB	228.63 kB	+0.14%	50.52 kB	50.59 kB
oss-experimental/react-server-dom-esm/esm/react-server-dom-esm-client.browser.development.js	+0.22%	228.13 kB	228.63 kB	+0.14%	50.52 kB	50.59 kB

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