By using clang-format directives 'IncludeBlocks' and 'IncludeCategories'
headers are regrouped by categories:
1. "cmConfigure.h" which must be first
2. header matching current implementation file
3. standard language headers
4. CMake replacement ones
5. external headers (i.e. #include directive with '<' and '>')
6. Qt headers
7. cmsys/* headers
8. cm_* headers
9. CMake headers (i.e. starting with 'cm[A-Z]')
10. all other headers
Fixes: #19674
WinRT components need to be referenced in a similar way that managed
code libraries are referenced. Validate that the library reference is a
WinRT component and reference it through the project.
Add test coverage for `VS_WINRT_COMPONENT`. While at it, fix the IOT
reference failing on Win10 SDK 17763 which doesn't include it anymore.
Fixes: #18846
Run the `Utilities/Scripts/clang-format.bash` script to update
all our C++ code to a new style defined by `.clang-format`.
Use `clang-format` version 3.8.
* 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.
These tests use a precompiled header that must be included first.
Include the header in an isolated block so that tools that sort
includes do not move it.
