Ensure react-is version used for resolution for playwright is installed

[jstejada]

Summary

In #22790, we added a custom yarn resolution for the react-is package so that when we ran React Devtools E2E tests using playwright, we wouldn't incorrectly use the top level version of react-is in this repo (which would fail because src code hasn't undergone transpilation), and instead use the actual packaged version from npm.

However, we noticed that when trying to run an internal build of devtools we were running into the following error:

The reason was that the package specified in the resolutions wasn't installed at all in the repo for some reason, so yarn couldn't find it.

To fix this, this commit makes it so we always install react-is from npm via our resolutions, instead of a specific version.

How did you test this change?

• Locally in react-devtools-inline: yarn test:e2e works now (tests are running, but they are failing on main currently)
• Internally sync script can correctly build devtools now

[sizebot]

Comparing: 149b420...4cd099d

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	=	129.98 kB	129.98 kB	=	41.56 kB	41.56 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js	=	134.74 kB	134.74 kB	=	42.96 kB	42.96 kB
facebook-www/ReactDOM-prod.classic.js	=	424.49 kB	424.49 kB	=	78.24 kB	78.24 kB
facebook-www/ReactDOM-prod.modern.js	=	413.04 kB	413.04 kB	=	76.50 kB	76.50 kB
facebook-www/ReactDOMForked-prod.classic.js	=	424.49 kB	424.49 kB	=	78.24 kB	78.24 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against 4cd099d