Fix spotless cache configuration (#15531)

Author: trask

conventions/src/main/kotlin/otel.spotless-conventions.gradle.kts

@@ -14,15 +14,6 @@ spotless {
     toggleOffOn()
     target("src/**/*.java")
   }
-  plugins.withId("groovy") {
-    groovy {
-      licenseHeaderFile(
-        rootProject.file("buildscripts/spotless.license.java"),
-        "(package|import|(?:abstract )?class)"
-      )
-      endWithNewline()
-    }
-  }
   plugins.withId("scala") {
     scala {
       scalafmt()
@@ -103,6 +94,15 @@ if (project == rootProject) {
       trimTrailingWhitespace()
       endWithNewline()
     }
+    groovy {
+      target("**/*.groovy")
+      targetExclude("buildscripts/codenarc.groovy")
+      licenseHeaderFile(
+        rootProject.file("buildscripts/spotless.license.java"),
+        "(package|import|(?:abstract )?class)"
+      )
+      endWithNewline()
+    }
     predeclareDeps()
   }
 
@@ -121,8 +121,3 @@ if (project == rootProject) {
     }
   }
 }
-
-// Disable configuration cache for spotlessGroovy task which is not compatible
-tasks.matching { it.name.contains("spotlessGroovy") }.configureEach {
-  notCompatibleWithConfigurationCache("Spotless Groovy task references other Task instances which are not supported with configuration cache")
-}