InnoSetup: Always specify at least one component installation type

Jannik Alberrequested to merge
jannikalber/cmake:master into master

Inno Setup implicitly creates three installation types if none is specified in the script. This causes some component features (e.g. REQUIRED) to lose their functionality. Now, the generator is always specifying a "custom" installation type when using components.

Fixes: #25083 (closed)
Backport: release
Topic-rename: innosetup-component-install

Edited by Brad King

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