[docs] Performance: update outdated info

[jamonholmgren]

The state of the Performance document is pretty outdated; this PR takes a step toward at least fixing or removing sections that would be misleading or confusing to React Native developers on the latest versions.

Changes

• Changed very old Navigator / NavigatorIOS references to React Navigation
• Changed class component references to function component
• On lists, added references to FlashList/Legend List, which are broadly used in the community
• Removed old-school optimizations for ListView
• Removed references to enabling shouldRasterizeIOS and renderToHardwareTextureAndroid, as these are now enabled by default
• Removed Slow navigator transitions section, which is about the removed Navigator animations.

Minor tweaks

• Added links to relevant other documentation
• Added iOS and Android where appropriate
• Added alt text
• Minor rewording

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