JBDS-4138 Remove setx VAGRANT_DETECTED_OS setup from vagrant installer
JBDS-4138 Remove setx VAGRANT_DETECTED_OS setup from vagrant installer

Fix remoses execution setx from vagrant.js, because it is CDK
responsibility to set it up.

redhat-developer-tooling/developer-platform-install,dgolovin/developer-platform-install,redhat-developer-tooling/developer-platform-install,dgolovin/developer-platform-install