Repair the import for bloop-based IDEs.

This was subtly broken in 478c7a4
because the projects' settings want to `+=` to `buildInfoOptions`.
When we don't include the settings of `BuildInfoPlugin`, there is
no initial value for that setting, and therefore the build fails.

Author: sjrd

project/Build.scala

@@ -287,8 +287,9 @@ object Build {
   private def buildInfoOrStubs(config: Configuration, stubsBaseDir: Def.Initialize[File]) = {
     if (isGeneratingForIDE) {
       Def.settings(
-          unmanagedSourceDirectories in config +=
-            stubsBaseDir.value / "scala-ide-stubs"
+        unmanagedSourceDirectories in config +=
+          stubsBaseDir.value / "scala-ide-stubs",
+        config / buildInfoOptions := Nil,
       )
     } else {
       Def.settings(