Instability on Windows 8 CI

Some builds on Windows 8 have failed for unknown reasons recently :

• https://gitlab.orfeo-toolbox.org/orfeotoolbox/otb/-/jobs/27117 on merge request !722 (merged). Very unlikely to be related to the content of the MR. The job succeeded on another try.
• https://gitlab.orfeo-toolbox.org/orfeotoolbox/otb/-/jobs/27693 from develop and https://gitlab.orfeo-toolbox.org/orfeotoolbox/otb/-/jobs/27651 from !707 (merged). The build doesn't fail, but the test are not executed because otb executable are not found. It looks like the compilation failed silently. There is this warning :

*** WARNING non-zero return value in ctest from: C:\tools\cmake\bin\cmake.exe