In commit a7780d1b9c (ctest: Add a `CoverageTool` setting to enable
integration with `llvm-cov`, 2026-04-15, v4.4.0-rc1~230^2) we missed a
closing parenthesis in the internal script backing the CTest build
targets.
Add a `CTEST_TEST_COVERAGE_TOOL` variable to tell CTest to integrate
with `llvm-cov` source-based code coverage by setting the
`LLVM_PROFILE_FILE` environment variable for each test.
Issue: #26932
The file was added by commit 3006560d86 (ENH: Add template of ctest
script, 2006-04-28, v2.6.0~3433), but we do not use it for anything.
Technically it was public-facing by being in the `Templates/` directory,
but was never documented.