Some modules don't make sense in the split frontend process (JetBrains Client), at least for now. Adding an explicit dependency on a marker 'intellij.platform.backend' module is needed to avoid putting such modules to separate JARs after automatic splitting in the build scripts is implemented (IJPL-164312): it doesn't make sense for these modules, and it's better to avoid changes in the layout without reason.
GitOrigin-RevId: a617d02f4f359d4d7741f7303e55193269f5ef69
