Don't "fix up" mismatched text content with suppressedHydrationWarning (

#26391)

In concurrent mode we error if child nodes mismatches which triggers a
recreation of the whole hydration boundary. This ensures that we don't
replay the wrong thing, transform state or other security issues.

For text content, we respect `suppressedHydrationWarning` to allow for
things like `<div suppressedHydrationWarning>{timestamp}</div>` to
ignore the timestamp. This mode actually still patches up the text
content to be the client rendered content.

In principle we shouldn't have to do that because either value should be
ok, and arguably it's better not to trigger layout thrash after the
fact.

We do have a lot of code still to deal with patching up the tree because
that's what legacy mode does which is still in the code base. When we
delete legacy mode we would still be stuck with a lot of it just to deal
with this case.

Therefore I propose that we change the semantics to not patch up
hydration errors for text nodes. We already don't for attributes.

DiffTrain build for [8fa41ff](8fa41ff)

compiled/facebook-www/REVISION

@@ -1 +1 @@
-05777ffb01515679d73541062a4ecc745af04a2f
+8fa41ffa275cae4895b650b0c3b5e8acdbb5055d

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

@@ -27,7 +27,7 @@ if (
 }
           "use strict";
 
-var ReactVersion = "18.3.0-www-modern-3b134919";
+var ReactVersion = "18.3.0-www-modern-619d6df2";
 
 // ATTENTION
 // When adding new symbols to this file,

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

@@ -69,7 +69,7 @@ function _assertThisInitialized(self) {
   return self;
 }
 
-var ReactVersion = "18.3.0-www-classic-5b5939f0";
+var ReactVersion = "18.3.0-www-classic-f0721814";
 
 var LegacyRoot = 0;
 var ConcurrentRoot = 1;

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

@@ -9556,7 +9556,7 @@ var slice = Array.prototype.slice,
       return null;
     },
     bundleType: 0,
-    version: "18.3.0-www-modern-01e5635a",
+    version: "18.3.0-www-modern-7676418b",
     rendererPackageName: "react-art"
   };
 var internals$jscomp$inline_1283 = {
@@ -9587,7 +9587,7 @@ var internals$jscomp$inline_1283 = {
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "18.3.0-www-modern-01e5635a"
+  reconcilerVersion: "18.3.0-www-modern-7676418b"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
   var hook$jscomp$inline_1284 = __REACT_DEVTOOLS_GLOBAL_HOOK__;