Upgrade useInsertionEffect to stable (facebook#22589)

@huozhi tried this out and says it's working as expected. I think we
can go ahead and move this into the stable channel, so that it is
available in the React 18 alpha releases.

Author: acdlite

packages/react-debug-tools/src/__tests__/ReactHooksInspectionIntegration-test.js

@@ -268,9 +268,8 @@ describe('ReactHooksInspectionIntegration', () => {
     ]);
   });
 
-  // @gate experimental || www
   it('should inspect the current state of all stateful hooks, including useInsertionEffect', () => {
-    const useInsertionEffect = React.unstable_useInsertionEffect;
+    const useInsertionEffect = React.useInsertionEffect;
     const outsideRef = React.createRef();
     function effect() {}
     function Foo(props) {

packages/react-dom/src/__tests__/ReactDOMServerIntegrationHooks-test.js

@@ -55,7 +55,7 @@ function initModules() {
   useRef = React.useRef;
   useDebugValue = React.useDebugValue;
   useImperativeHandle = React.useImperativeHandle;
-  useInsertionEffect = React.unstable_useInsertionEffect;
+  useInsertionEffect = React.useInsertionEffect;
   useLayoutEffect = React.useLayoutEffect;
   useOpaqueIdentifier = React.unstable_useOpaqueIdentifier;
   forwardRef = React.forwardRef;
@@ -641,7 +641,6 @@ describe('ReactDOMServerHooks', () => {
     });
   });
   describe('useInsertionEffect', () => {
-    // @gate experimental || www
     it('should warn when invoked during render', async () => {
       function Counter() {
         useInsertionEffect(() => {

packages/react-reconciler/src/__tests__/ReactHooksWithNoopRenderer-test.js

@@ -47,7 +47,7 @@ describe('ReactHooksWithNoopRenderer', () => {
     useState = React.useState;
     useReducer = React.useReducer;
     useEffect = React.useEffect;
-    useInsertionEffect = React.unstable_useInsertionEffect;
+    useInsertionEffect = React.useInsertionEffect;
     useLayoutEffect = React.useLayoutEffect;
     useCallback = React.useCallback;
     useMemo = React.useMemo;
@@ -2685,7 +2685,6 @@ describe('ReactHooksWithNoopRenderer', () => {
   });
 
   describe('useInsertionEffect', () => {
-    // @gate experimental || www
     it('fires insertion effects after snapshots on update', () => {
       function CounterA(props) {
         useInsertionEffect(() => {
@@ -2745,7 +2744,6 @@ describe('ReactHooksWithNoopRenderer', () => {
       });
     });
 
-    // @gate experimental || www
     it('fires insertion effects before layout effects', () => {
       let committedText = '(empty)';
 
@@ -2808,7 +2806,6 @@ describe('ReactHooksWithNoopRenderer', () => {
       expect(Scheduler).toHaveYielded(['Destroy passive [current: 0]']);
     });
 
-    // @gate experimental || www
     it('force flushes passive effects before firing new insertion effects', () => {
       let committedText = '(empty)';
 
@@ -2876,7 +2873,6 @@ describe('ReactHooksWithNoopRenderer', () => {
       ]);
     });
 
-    // @gate experimental || www
     it('fires all insertion effects (interleaved) before firing any layout effects', () => {
       let committedA = '(empty)';
       let committedB = '(empty)';
@@ -3043,7 +3039,6 @@ describe('ReactHooksWithNoopRenderer', () => {
       });
     });
 
-    // @gate experimental || www
     it('assumes insertion effect destroy function is either a function or undefined', () => {
       function App(props) {
         useInsertionEffect(() => {

packages/react/index.classic.fb.js

@@ -48,7 +48,7 @@ export {
   useEffect,
   useImperativeHandle,
   useLayoutEffect,
-  unstable_useInsertionEffect,
+  useInsertionEffect,
   useMemo,
   useMutableSource,
   useMutableSource as unstable_useMutableSource,

packages/react/index.experimental.js

@@ -42,7 +42,7 @@ export {
   useDeferredValue,
   useEffect,
   useImperativeHandle,
-  unstable_useInsertionEffect,
+  useInsertionEffect,
   useLayoutEffect,
   useMemo,
   useMutableSource as unstable_useMutableSource,

packages/react/index.js

@@ -67,7 +67,7 @@ export {
   useDeferredValue,
   useEffect,
   useImperativeHandle,
-  unstable_useInsertionEffect,
+  useInsertionEffect,
   useLayoutEffect,
   useMemo,
   useMutableSource,

packages/react/index.modern.fb.js

@@ -46,7 +46,7 @@ export {
   useDeferredValue as unstable_useDeferredValue, // TODO: Remove once call sights updated to useDeferredValue
   useEffect,
   useImperativeHandle,
-  unstable_useInsertionEffect,
+  useInsertionEffect,
   useLayoutEffect,
   useMemo,
   useMutableSource,

packages/react/index.stable.js

@@ -36,6 +36,7 @@ export {
   useDeferredValue,
   useEffect,
   useImperativeHandle,
+  useInsertionEffect,
   useLayoutEffect,
   useMemo,
   useMutableSource as unstable_useMutableSource,

packages/react/src/React.js

@@ -92,7 +92,7 @@ export {
   useEffect,
   useImperativeHandle,
   useDebugValue,
-  useInsertionEffect as unstable_useInsertionEffect,
+  useInsertionEffect,
   useLayoutEffect,
   useMemo,
   useMutableSource,