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

Source/cmInstallCxxModuleBmiGenerator.h

@@ -40,7 +40,7 @@ public:
   MessageLevel GetMessageLevel() const { return this->Message; }
 
 protected:
-  void GenerateScriptForConfig(std::ostream& os, const std::string& config,
+  void GenerateScriptForConfig(std::ostream& os, std::string const& config,
                                Indent indent) override;
 
   std::string const TargetName;