Revise C++ coding style using clang-format with "east const"

Run the `clang-format.bash` script to update all our C and C++ code to a
new style defined by `.clang-format`, now with "east const" enforcement.
Use `clang-format` version 18.

* If you reached this commit for a line in `git blame`, re-run the blame
  operation starting at the parent of this commit to see older history
  for the content.

* See the parent commit for instructions to rebase a change across this
  style transition commit.

Issue: #26123

Help/guide/tutorial/Step12/MathFunctions/MakeTable.cxx

@@ -11,7 +11,7 @@ int main(int argc, char* argv[])
   }
 
   std::ofstream fout(argv[1], std::ios_base::out);
-  const bool fileOpen = fout.is_open();
+  bool const fileOpen = fout.is_open();
   if (fileOpen) {
     fout << "double sqrtTable[] = {" << std::endl;
     for (int i = 0; i < 10; ++i) {