Add test for throttling suspended siblings

[rickhanlonii]

Overview

Adds a test to show the combination of the new throttling behavior and not pre-rendering siblings results in pushing out content that could have rendered much faster.

• Without the new throttling, the sibling content would render in 30ms.
• Without removing pre-rendering, the sibling content would render in 0ms.
• With both, the sibling content takes 600ms.

Example

Screen.Recording.2024-02-16.at.6.54.31.PM.mov

[react-sizebot]

Comparing: 374fd68...387cf38

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.min.js	=	176.82 kB	176.82 kB	=	55.12 kB	55.12 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js	=	178.81 kB	178.81 kB	=	55.70 kB	55.70 kB
facebook-www/ReactDOM-prod.classic.js	=	593.39 kB	593.39 kB	=	104.69 kB	104.69 kB
facebook-www/ReactDOM-prod.modern.js	=	577.17 kB	577.17 kB	=	101.78 kB	101.78 kB
test_utils/ReactAllWarnings.js	Deleted	67.02 kB	0.00 kB	Deleted	16.42 kB	0.00 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
test_utils/ReactAllWarnings.js	Deleted	67.02 kB	0.00 kB	Deleted	16.42 kB	0.00 kB

Generated by 🚫 dangerJS against 387cf38