Merge topic 'cxxmodule-module-support-tweaks'

c53748cc09 Tests/RunCMake/CXXModules: mark IMPORTED targets as INTERFACE
a971fcfde7 cmNinjaNormalTargetGenerator: use `cmStrCat`
b7509d6bf8 cmNinjaNormalTargetGenerator: fix grammar in verbose comment
0015cb95de cmGlobalNinjaGenerator: fix comment typo

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !7943