[Fizz] declare bootstrap script preloads to be fetchPriority: 'low' (…

…#27189)

Generally scripts should not be preloaded before images but if they
arrive earlier than image preloads (or images) the network (or server)
may be saturated responding to inflight script preloads and not
sufficiently prioritize images arriving later. This change marks the
preloaded bootstrap script with a `low` fetch priority to signal to
supporting browsers that the request should be deprioritized. This
should make the preload operate similar to async script fetch priority
which is low by default according to https://web.dev/fetch-priority/

Additionally the bootstrap script preloads will emit before
preinitialized scripts do. Normal script preloads will continue to be
prioritized after stylesheets

This change can land separatrely but is part of a larger effort to
implement elevating image loading and making script loading less
blocking. Later changes will emit used suspensey images earlier in the
queue and will stop favoring scripts over images that are explicitly
preloaded

DiffTrain build for commit 9edf470.

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

@@ -23982,7 +23982,7 @@ function createFiberRoot(
   return root;
 }
 
-var ReactVersion = "18.3.0-canary-ea17cc18f-20230807";
+var ReactVersion = "18.3.0-canary-9edf470d6-20230807";
 
 // Might add PROFILE later.
 

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

@@ -8630,7 +8630,7 @@ var devToolsConfig$jscomp$inline_1032 = {
     throw Error("TestRenderer does not support findFiberByHostInstance()");
   },
   bundleType: 0,
-  version: "18.3.0-canary-ea17cc18f-20230807",
+  version: "18.3.0-canary-9edf470d6-20230807",
   rendererPackageName: "react-test-renderer"
 };
 var internals$jscomp$inline_1231 = {
@@ -8661,7 +8661,7 @@ var internals$jscomp$inline_1231 = {
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "18.3.0-canary-ea17cc18f-20230807"
+  reconcilerVersion: "18.3.0-canary-9edf470d6-20230807"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
   var hook$jscomp$inline_1232 = __REACT_DEVTOOLS_GLOBAL_HOOK__;

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

@@ -9056,7 +9056,7 @@ var devToolsConfig$jscomp$inline_1074 = {
     throw Error("TestRenderer does not support findFiberByHostInstance()");
   },
   bundleType: 0,
-  version: "18.3.0-canary-ea17cc18f-20230807",
+  version: "18.3.0-canary-9edf470d6-20230807",
   rendererPackageName: "react-test-renderer"
 };
 var internals$jscomp$inline_1272 = {
@@ -9087,7 +9087,7 @@ var internals$jscomp$inline_1272 = {
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "18.3.0-canary-ea17cc18f-20230807"
+  reconcilerVersion: "18.3.0-canary-9edf470d6-20230807"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
   var hook$jscomp$inline_1273 = __REACT_DEVTOOLS_GLOBAL_HOOK__;

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

@@ -27,7 +27,7 @@ if (
 }
           "use strict";
 
-var ReactVersion = "18.3.0-canary-ea17cc18f-20230807";
+var ReactVersion = "18.3.0-canary-9edf470d6-20230807";
 
 // ATTENTION
 // When adding new symbols to this file,

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

@@ -616,4 +616,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactCurrentDispatcher.current.useTransition();
 };
-exports.version = "18.3.0-canary-ea17cc18f-20230807";
+exports.version = "18.3.0-canary-9edf470d6-20230807";

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

@@ -619,7 +619,7 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactCurrentDispatcher.current.useTransition();
 };
-exports.version = "18.3.0-canary-ea17cc18f-20230807";
+exports.version = "18.3.0-canary-9edf470d6-20230807";
 
           /* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
 if (

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

@@ -1 +1 @@
-ea17cc18f458010c89c1bf494be08bb782d034af
+9edf470d6ed1f3ac12c23a248e64293f367c1797