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
KWSys now requires C++11 but we want this test to be able to run as
C++98. Copy the KWSys DynamicLoader implementation (with original
notice headers and license reference) and update it to work alone.
Kitware Robot