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cmGlobalGenerator: clear RuntimeDependencySet members at configure

Ben Boeckel requested to merge ben.boeckel/cmake:ccmake-install-rds-crash into master

Commit f2617cf8 (Source: Add cmInstallRuntimeDependencySet, 2021-05-19) introduced via !6186 (merged) to 3.21 added storage to the global generator for runtime dependency sets. However, this was not cleared at the start of configure in the ClearGeneratorMembers() method. When using ccmake to configure (and, presumably cmake-gui too), projects using install(TARGETS … RUNTIME_DEPENDENCY_SET) would use dependency set tracking instances from previous configure runs that held references to targets free'd with the cmMakefile instance that held them.

Clear the dependency sets at the beginning of configure so that they are not remembered and trigger via use-after-free bugs when used.

Fixes: #25446 (closed)

Backport: release

Edited by Ben Boeckel

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