* Remove `CTEST_PROJECT_NAME`, as it is no longer used.
* Set `CTEST_SUBMIT_URL` instead of `CTEST_DROP_*`.
* Remove `CTEST_SUBMIT_URL`, as it is not used.
Add a copy of the CTestConfig.cmake from Step 9 into the directory for
Step 8.
Expand the information about the contents of the CTestConfig file and
write a brief explanation of where on CDash to acquire the CTestConfig
file for a specific project.
CMake Issue: #22663
Extend the change from commit 9e5bbb69ea (Tutorial: Add captions for
code blocks, 2021-06-11) to also add a Sphinx named target to code
blocks. Name each target after the change the code block makes.