diagnostics rules are now resilient to Wconf silencing on LTS

#2275

Author: bjaglin

build.sbt

@@ -250,7 +250,16 @@ lazy val input = projectMatrix
     coverageEnabled := false,
     // mimic dependsOn(shared) but allowing binary Scala version matching
     Compile / internalDependencyClasspath ++=
-      resolve(shared, Compile / exportedProducts).value
+      resolve(shared, Compile / exportedProducts).value,
+    scalacOptions ++= {
+      // exercise https://github.com/scala/scala3/pull/23587
+      scalaVersion.value match {
+        case v if v.startsWith("2.") => Seq() // E198 not available on 2.x
+        case v if v.startsWith("3.5") || v.startsWith("3.6") => Seq() // EOL
+        case "3.7.2" => Seq() // version anterior to the fix
+        case _ => Seq("-Wconf:id=E198:info")
+      }
+    }
   )
   .defaultAxes(VirtualAxis.jvm)
   .jvmPlatformTargets(cliScalaVersionsWithTargets.map(_._2))