Add compareDocumentPosition to fragment instances (#32722)

This adds `compareDocumentPosition(otherNode)` to fragment instances.

The semantics implemented are meant to match typical element
positioning, with some fragment specifics. See the unit tests for all
expectations.

- An element preceding a fragment is `Node.DOCUMENT_POSITION_PRECEDING`
- An element after a fragment is `Node.DOCUMENT_POSITION_FOLLOWING`
- An element containing the fragment is
`Node.DOCUMENT_POSITION_PRECEDING` and
`Node.DOCUMENT_POSITION_CONTAINING`
- An element within the fragment is
`Node.DOCUMENT_POSITION_CONTAINED_BY`
- An element compared against an empty fragment will result in
`Node.DOCUMENT_POSITION_DISCONNECTED` and
`Node.DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC`

Since we assume a fragment instances target children are DOM siblings
and we want to compare the full fragment as a pseudo container, we can
compare against the first target child outside of handling the special
cases (empty fragments and contained elements).

DiffTrain build for [e5a8de8](e5a8de8)

Author: jackpope

compiled-rn/VERSION_NATIVE_FB

@@ -1 +1 @@
-19.2.0-native-fb-7a2c7045-20250506
+19.2.0-native-fb-e5a8de81-20250506

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

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<f21fcfa9a0261ffbe6c81ab6c9e8d3cd>>
+ * @generated SignedSource<<499336b510771eac34cdb1f2efd2783c>>
  */
 
 "use strict";
@@ -404,5 +404,5 @@ __DEV__ &&
     exports.useFormStatus = function () {
       return resolveDispatcher().useHostTransitionStatus();
     };
-    exports.version = "19.2.0-native-fb-7a2c7045-20250506";
+    exports.version = "19.2.0-native-fb-e5a8de81-20250506";
   })();

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

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<40819af206919ac7d01cba0a2be096fb>>
+ * @generated SignedSource<<e0055236c23545f61906397ccc9a19f8>>
  */
 
 "use strict";
@@ -203,4 +203,4 @@ exports.useFormState = function (action, initialState, permalink) {
 exports.useFormStatus = function () {
   return ReactSharedInternals.H.useHostTransitionStatus();
 };
-exports.version = "19.2.0-native-fb-7a2c7045-20250506";
+exports.version = "19.2.0-native-fb-e5a8de81-20250506";

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

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<40819af206919ac7d01cba0a2be096fb>>
+ * @generated SignedSource<<e0055236c23545f61906397ccc9a19f8>>
  */
 
 "use strict";
@@ -203,4 +203,4 @@ exports.useFormState = function (action, initialState, permalink) {
 exports.useFormStatus = function () {
   return ReactSharedInternals.H.useHostTransitionStatus();
 };
-exports.version = "19.2.0-native-fb-7a2c7045-20250506";
+exports.version = "19.2.0-native-fb-e5a8de81-20250506";