Windows Installer: Provide reliable installation path

[Okeanos]

When installing any of the Adoptium versions on Windows a version specific (including patch level) path is used by default:

If I understand e.g. #88 correctly then path variables and registry keys are updated on update. That's fine and a good beginning, however, insufficient in some use cases. For instance Maven Toolchains are an optional, manual setup that tell Maven where to find major versions of JDKs that a user has installed. The paths are essentially hardcoded in the declaration file. So if I want my toolchains to always point to the latest JDK of a major release I'll manually have to update that after installation of the patch version.

I therefore propose to shorten the default installation path of Adoptium to the major version only, e.g. C:\Program Files\Eclipse Adoptium\jdk-11.0.14.9-hotspot becomes C:\Program Files\Eclipse Adoptium\jdk-11-hotspot. This would also align with macOS for example where the path is usually /Library/Java/JavaVirtualMachines/temurin-11.jdk.

On linux the .deb path is also major release only:

$ update-java-alternatives -l
temurin-11-jdk-amd64           1111       /usr/lib/jvm/temurin-11-jdk-amd64
temurin-17-jdk-amd64           1161       /usr/lib/jvm/temurin-17-jdk-amd64

I guess this also relates to #352 in some way.