Add sideEffects flag to react-is for tree shaking (#27701)

## Summary

This PR:

- Adds the `"sideEffects": false` flag to the `react-is` package, to
enable proper tree-shaking

## How did you test this change?

React-Redux v9 beta switches its artifacts from separate JS files to
pre-bundled artifacts. While testing builds locally, I noticed that our
use of `react-is` was no longer getting tree-shaken from Vite builds,
despite `react-is` only being used by our `connect` API and `connect`
itself getting shaken out of the final bundle.

Hand-adding `"sideEffects": false` to the `react-is` package locally
convinced Vite (+Rollup) to properly tree-shake `react-is` out of the
bundle when it wasn't being used.

I'd love to see this published as v18.2.1 as soon as this PR is merged -
we're hoping to release React-Redux v9 in the next few weeks!

DiffTrain build for commit 108fd8c.

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-dev.js

@@ -25474,7 +25474,7 @@ if (__DEV__) {
       return root;
     }
 
-    var ReactVersion = "18.3.0-canary-dc40571b3-20231201";
+    var ReactVersion = "18.3.0-canary-108fd8cab-20231201";
 
     // Might add PROFILE later.
 

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-prod.js

@@ -9083,7 +9083,7 @@ var devToolsConfig$jscomp$inline_1033 = {
     throw Error("TestRenderer does not support findFiberByHostInstance()");
   },
   bundleType: 0,
-  version: "18.3.0-canary-dc40571b3-20231201",
+  version: "18.3.0-canary-108fd8cab-20231201",
   rendererPackageName: "react-test-renderer"
 };
 var internals$jscomp$inline_1226 = {
@@ -9114,7 +9114,7 @@ var internals$jscomp$inline_1226 = {
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "18.3.0-canary-dc40571b3-20231201"
+  reconcilerVersion: "18.3.0-canary-108fd8cab-20231201"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
   var hook$jscomp$inline_1227 = __REACT_DEVTOOLS_GLOBAL_HOOK__;

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react-test-renderer/cjs/ReactTestRenderer-profiling.js

@@ -9509,7 +9509,7 @@ var devToolsConfig$jscomp$inline_1075 = {
     throw Error("TestRenderer does not support findFiberByHostInstance()");
   },
   bundleType: 0,
-  version: "18.3.0-canary-dc40571b3-20231201",
+  version: "18.3.0-canary-108fd8cab-20231201",
   rendererPackageName: "react-test-renderer"
 };
 var internals$jscomp$inline_1267 = {
@@ -9540,7 +9540,7 @@ var internals$jscomp$inline_1267 = {
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "18.3.0-canary-dc40571b3-20231201"
+  reconcilerVersion: "18.3.0-canary-108fd8cab-20231201"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
   var hook$jscomp$inline_1268 = __REACT_DEVTOOLS_GLOBAL_HOOK__;

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/cjs/React-dev.js

@@ -24,7 +24,7 @@ if (__DEV__) {
     ) {
       __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStart(new Error());
     }
-    var ReactVersion = "18.3.0-canary-dc40571b3-20231201";
+    var ReactVersion = "18.3.0-canary-108fd8cab-20231201";
 
     // ATTENTION
     // When adding new symbols to this file,

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/cjs/React-prod.js

@@ -580,4 +580,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactCurrentDispatcher.current.useTransition();
 };
-exports.version = "18.3.0-canary-dc40571b3-20231201";
+exports.version = "18.3.0-canary-108fd8cab-20231201";

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/cjs/React-profiling.js

@@ -576,7 +576,7 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactCurrentDispatcher.current.useTransition();
 };
-exports.version = "18.3.0-canary-dc40571b3-20231201";
+exports.version = "18.3.0-canary-108fd8cab-20231201";
 "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
   "function" ===
     typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

compiled-rn/facebook-fbsource/xplat/js/react-native-github/Libraries/Renderer/REVISION

@@ -1 +1 @@
-dc40571b3efd18d4d08fdf6146ad5ec980ea12dd
+108fd8cab015688e6e8e57956c2f1ed1a0c054f2