[flags] make enableScrollEndPolyfill dynamic

[rickhanlonii]

Will roll this out in www

[react-sizebot]

Comparing: 443b7ff...e5623ba

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	=	6.68 kB	6.68 kB	=	1.83 kB	1.83 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	518.32 kB	518.32 kB	=	92.45 kB	92.45 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.69 kB	6.69 kB	+0.05%	1.83 kB	1.83 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	573.25 kB	573.25 kB	=	102.08 kB	102.08 kB
facebook-www/ReactDOM-prod.classic.js	+0.56%	638.14 kB	641.70 kB	+0.49%	112.31 kB	112.86 kB
facebook-www/ReactDOM-prod.modern.js	+0.57%	628.46 kB	632.02 kB	+0.52%	110.73 kB	111.30 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
facebook-www/ReactDOM-prod.modern.js	+0.57%	628.46 kB	632.02 kB	+0.52%	110.73 kB	111.30 kB
facebook-www/ReactDOM-prod.classic.js	+0.56%	638.14 kB	641.70 kB	+0.49%	112.31 kB	112.86 kB
facebook-www/ReactDOMTesting-prod.modern.js	+0.55%	643.18 kB	646.74 kB	+0.50%	114.44 kB	115.01 kB
facebook-www/ReactDOMTesting-prod.classic.js	+0.55%	652.86 kB	656.42 kB	+0.49%	116.02 kB	116.58 kB
facebook-www/ReactDOM-profiling.modern.js	+0.54%	655.85 kB	659.41 kB	+0.49%	114.61 kB	115.18 kB
facebook-www/ReactDOM-profiling.classic.js	+0.54%	665.58 kB	669.14 kB	+0.48%	116.21 kB	116.77 kB
facebook-www/ReactDOM-dev.modern.js	+0.39%	1,108.22 kB	1,112.50 kB	+0.35%	184.76 kB	185.40 kB
facebook-www/ReactDOM-dev.classic.js	+0.38%	1,117.36 kB	1,121.64 kB	+0.35%	186.50 kB	187.14 kB
facebook-www/ReactDOMTesting-dev.modern.js	+0.38%	1,125.13 kB	1,129.40 kB	+0.34%	188.63 kB	189.26 kB
facebook-www/ReactDOMTesting-dev.classic.js	+0.38%	1,134.27 kB	1,138.54 kB	+0.34%	190.35 kB	190.99 kB

Generated by 🚫 dangerJS against f7c57b6