Fix incorrect usage of React.ElementConfig and React.ElementRef in xplat

[SamChou19815]

Summary:
React.ElementConfig<a polymophic type> will result in unpredictable behavior in Flow due to some types being unresolved. Since the type is already broken in most cases, I use $FlowFixMe as the type for those type arguments that are currently inferred as empty.

Changelog: [Internal]

Differential Revision: D44774275

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D44774275

[github-actions]

	Warnings
⚠️	packages/rn-tester/js/examples/SectionList/SectionList-scrollable.js#L285 - packages/rn-tester/js/examples/SectionList/SectionList-scrollable.js line 285 – Do not define components during render. React will see a new component type on every render and destroy the entire subtree’s DOM nodes and state (https://reactjs.org/docs/reconciliation.html#elements-of-different-types). Instead, move this component definition out of the parent component “SectionList_scrollable” and pass data as props. If you want to allow component creation in props, set allowAsProps option to true. (react/no-unstable-nested-components)
⚠️	packages/rn-tester/js/examples/SectionList/SectionList-scrollable.js#L289 - packages/rn-tester/js/examples/SectionList/SectionList-scrollable.js line 289 – Do not define components during render. React will see a new component type on every render and destroy the entire subtree’s DOM nodes and state (https://reactjs.org/docs/reconciliation.html#elements-of-different-types). Instead, move this component definition out of the parent component “SectionList_scrollable” and pass data as props. If you want to allow component creation in props, set allowAsProps option to true. (react/no-unstable-nested-components)

Generated by 🚫 dangerJS against 893008b

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	8,625,234	+0
android	hermes	armeabi-v7a	7,937,961	+0
android	hermes	x86	9,112,304	+0
android	hermes	x86_64	8,967,010	+0
android	jsc	arm64-v8a	9,189,282	+0
android	jsc	armeabi-v7a	8,379,453	+0
android	jsc	x86	9,247,701	+0
android	jsc	x86_64	9,506,049	+0

Base commit: b4466c7
Branch: main

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D44774275

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D44774275

[facebook-github-bot]

This pull request has been merged in 0e59e2a.