[jsx] Warn when accessing an empty key prop

[OskarEichler]

Summary

Fixes #37433

Install React's development-only special-prop warning getter for empty keys ('').

Verification

• Added test

[github-actions]

Comparing: 2dc7da7...baa1279

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	=	7.35 kB	7.35 kB	=	1.96 kB	1.96 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	622.23 kB	622.23 kB	=	110.01 kB	110.01 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	7.36 kB	7.36 kB	=	1.96 kB	1.96 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	693.45 kB	693.45 kB	=	121.46 kB	121.46 kB
facebook-www/ReactDOM-prod.classic.js	=	713.62 kB	713.62 kB	=	124.94 kB	124.94 kB
facebook-www/ReactDOM-prod.modern.js	=	703.93 kB	703.93 kB	=	123.36 kB	123.36 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

_{Generated by sizebot against baa1279}

[eps1lon]

Thank you!