[compiler][bugfix] expand StoreContext to const / let / function variants (#32747)

```js
function Component() {
  useEffect(() => {
    let hasCleanedUp = false;
    document.addEventListener(..., () => hasCleanedUp ? foo() : bar());
    // effect return values shouldn't be typed as frozen
    return () => {
      hasCleanedUp = true;
    }
  };
}
```
### Problem
`PruneHoistedContexts` currently strips hoisted declarations and
rewrites the first `StoreContext` reassignment to a declaration. For
example, in the following example, instruction 0 is removed while a
synthetic `DeclareContext let` is inserted before instruction 1.

```js
// source
const cb = () => x; // reference that causes x to be hoisted

let x = 4;
x = 5;

// React Compiler IR
[0] DeclareContext HoistedLet 'x'
...
[1] StoreContext reassign 'x' = 4
[2] StoreContext reassign 'x' = 5
```

Currently, we don't account for `DeclareContext let`. As a result, we're
rewriting to insert duplicate declarations.
```js
// source
const cb = () => x; // reference that causes x to be hoisted

let x;
x = 5;

// React Compiler IR
[0] DeclareContext HoistedLet 'x'
...
[1] DeclareContext Let 'x'
[2] StoreContext reassign 'x' = 5
```

### Solution

Instead of always lowering context variables to a DeclareContext
followed by a StoreContext reassign, we can keep `kind: 'Const' | 'Let'
| 'Reassign' | etc` on StoreContext.
Pros:
- retain more information in HIR, so we can codegen easily `const` and
`let` context variable declarations back
- pruning hoisted `DeclareContext` instructions is simple.

Cons:
- passes are more verbose as we need to check for both `DeclareContext`
and `StoreContext` declarations

~(note: also see alternative implementation in
#32745

### Testing
Context variables are tricky. I synced and diffed changes in a large
meta codebase and feel pretty confident about landing this. About 0.01%
of compiled files changed. Among these changes, ~25% were [direct
bugfixes](https://www.internalfb.com/phabricator/paste/view/P1800029094).
The [other
changes](https://www.internalfb.com/phabricator/paste/view/P1800028575)
were primarily due to changed (corrected) mutable ranges from
#33047. I tried to represent most
interesting changes in new test fixtures

`

DiffTrain build for [9d795d3](9d795d3)

Author: mofeiZ

compiled/eslint-plugin-react-hooks/index.js

@@ -1 +1 @@
-12f4cb85c5847758ece81fc95b7eaedc1fb9ebd0
+9d795d3808f3202b36740a7a8eb60567bd7f6d90

compiled/facebook-www/REVISION

@@ -1 +1 @@
-12f4cb85c5847758ece81fc95b7eaedc1fb9ebd0
+9d795d3808f3202b36740a7a8eb60567bd7f6d90

compiled/facebook-www/REVISION_TRANSFORMS

@@ -1538,7 +1538,7 @@ __DEV__ &&
     exports.useTransition = function () {
       return resolveDispatcher().useTransition();
     };
-    exports.version = "19.2.0-www-classic-12f4cb85-20250430";
+    exports.version = "19.2.0-www-classic-9d795d38-20250430";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

compiled/facebook-www/React-dev.classic.js

@@ -1538,7 +1538,7 @@ __DEV__ &&
     exports.useTransition = function () {
       return resolveDispatcher().useTransition();
     };
-    exports.version = "19.2.0-www-modern-12f4cb85-20250430";
+    exports.version = "19.2.0-www-modern-9d795d38-20250430";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

compiled/facebook-www/React-dev.modern.js

@@ -636,4 +636,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.2.0-www-classic-12f4cb85-20250430";
+exports.version = "19.2.0-www-classic-9d795d38-20250430";

compiled/facebook-www/React-prod.classic.js

@@ -636,4 +636,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.2.0-www-modern-12f4cb85-20250430";
+exports.version = "19.2.0-www-modern-9d795d38-20250430";

compiled/facebook-www/React-prod.modern.js

@@ -640,7 +640,7 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.2.0-www-classic-12f4cb85-20250430";
+exports.version = "19.2.0-www-classic-9d795d38-20250430";
 "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
   "function" ===
     typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

compiled/facebook-www/React-profiling.classic.js

@@ -640,7 +640,7 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.2.0-www-modern-12f4cb85-20250430";
+exports.version = "19.2.0-www-modern-9d795d38-20250430";
 "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
   "function" ===
     typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

compiled/facebook-www/React-profiling.modern.js

@@ -19014,10 +19014,10 @@ __DEV__ &&
     (function () {
       var internals = {
         bundleType: 1,
-        version: "19.2.0-www-classic-12f4cb85-20250430",
+        version: "19.2.0-www-classic-9d795d38-20250430",
         rendererPackageName: "react-art",
         currentDispatcherRef: ReactSharedInternals,
-        reconcilerVersion: "19.2.0-www-classic-12f4cb85-20250430"
+        reconcilerVersion: "19.2.0-www-classic-9d795d38-20250430"
       };
       internals.overrideHookState = overrideHookState;
       internals.overrideHookStateDeletePath = overrideHookStateDeletePath;
@@ -19051,7 +19051,7 @@ __DEV__ &&
     exports.Shape = Shape;
     exports.Surface = Surface;
     exports.Text = Text;
-    exports.version = "19.2.0-www-classic-12f4cb85-20250430";
+    exports.version = "19.2.0-www-classic-9d795d38-20250430";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&