Add isIdentical to StringGuts and use it for comparation

Author: WindowsMEMZ

stdlib/public/core/StringGuts.swift

@@ -418,6 +418,13 @@ extension _StringGuts {
   }
 }
 
+extension _StringGuts {
+  @inline(__always) // Performance
+  internal func isTriviallyIdentical(to other: Self) -> Bool {
+    self.rawBits == other.rawBits
+  }
+}
+
 #if _runtime(_ObjC)
 extension _StringGuts {
 

stdlib/public/core/StringUTF16View.swift

@@ -1064,6 +1064,6 @@ extension String.UTF16View {
   /// - Complexity: O(1)
   @available(SwiftStdlib 6.3, *)
   public func isTriviallyIdentical(to other: Self) -> Bool {
-    self._guts.rawBits == other._guts.rawBits
+    self._guts.isTriviallyIdentical(to: other._guts)
   }
 }

stdlib/public/core/StringUTF8View.swift

@@ -692,6 +692,6 @@ extension String.UTF8View {
   /// - Complexity: O(1)
   @available(SwiftStdlib 6.3, *)
   public func isTriviallyIdentical(to other: Self) -> Bool {
-    self._guts.rawBits == other._guts.rawBits
+    self._guts.isTriviallyIdentical(to: other._guts)
   }
 }

stdlib/public/core/StringUnicodeScalarView.swift

@@ -535,6 +535,6 @@ extension String.UnicodeScalarView {
   /// - Complexity: O(1)
   @available(SwiftStdlib 6.3, *)
   public func isTriviallyIdentical(to other: Self) -> Bool {
-    self._guts.rawBits == other._guts.rawBits
+    self._guts.isTriviallyIdentical(to: other._guts)
   }
 }