Drop intermediate JavaVersion11/17/21 recipes (#468)

* Drop intermediate JavaVersion11/17/21 recipes

These only delegate to UpgradeJavaVersion, but had a displayName and description that were Maven specific, despite also updating Gradle build files, and source file markers after 9c6acfb

* Drop duplicate tests

Author: timtebeek

src/main/resources/META-INF/rewrite/java-version-11.yml

@@ -57,7 +57,12 @@ recipeList:
   - org.openrewrite.java.migrate.cobertura.RemoveCoberturaMavenPlugin
   - org.openrewrite.java.migrate.wro4j.UpgradeWro4jMavenPluginVersion
   - org.openrewrite.java.migrate.jacoco.UpgradeJaCoCoMavenPluginVersion
-  - org.openrewrite.java.migrate.JavaVersion11
+  - org.openrewrite.java.migrate.UpgradeJavaVersion:
+      version: 11
+  - org.openrewrite.maven.UpgradePluginVersion:
+      groupId: org.apache.maven.plugins
+      artifactId: maven-compiler-plugin
+      newVersion: 3.6.2
 # Disabled due to null safety issues in the current implementation
 # https://github.com/openrewrite/rewrite-migrate-java/issues/250
 #  - org.openrewrite.java.migrate.util.JavaUtilAPIs
@@ -71,18 +76,6 @@ recipeList:
 
 ---
 type: specs.openrewrite.org/v1beta/recipe
-name: org.openrewrite.java.migrate.JavaVersion11
-displayName: Change Maven Java version property values to 11
-description: Change maven.compiler.source and maven.compiler.target values to 11.
-recipeList:
-  - org.openrewrite.java.migrate.UpgradeJavaVersion:
-      version: 11
-  - org.openrewrite.maven.UpgradePluginVersion:
-      groupId: org.apache.maven.plugins
-      artifactId: maven-compiler-plugin
-      newVersion: 3.6.2
----
-type: specs.openrewrite.org/v1beta/recipe
 name: org.openrewrite.java.migrate.javax.AddJaxbDependencies
 displayName: Add explicit JAXB dependencies
 description: >

src/main/resources/META-INF/rewrite/java-version-17.yml

@@ -27,7 +27,8 @@ tags:
   - java17
 recipeList:
   - org.openrewrite.java.migrate.Java8toJava11
-  - org.openrewrite.java.migrate.JavaVersion17
+  - org.openrewrite.java.migrate.UpgradeJavaVersion:
+      version: 17
   - org.openrewrite.java.migrate.lang.StringFormatted
   - org.openrewrite.github.SetupJavaUpgradeJavaVersion:
       minimumJavaMajorVersion: 17
@@ -57,17 +58,6 @@ recipeList:
   - org.openrewrite.java.migrate.RemovedFileIOFinalizeMethods
 ---
 type: specs.openrewrite.org/v1beta/recipe
-name: org.openrewrite.java.migrate.JavaVersion17
-displayName: Change Maven Java version property values to 17
-description: Change maven.compiler.source and maven.compiler.target values to 17.
-tags:
-  - java17
-  - compiler
-recipeList:
-  - org.openrewrite.java.migrate.UpgradeJavaVersion:
-      version: 17
----
-type: specs.openrewrite.org/v1beta/recipe
 name: org.openrewrite.java.migrate.DeprecatedJavaxSecurityCert
 displayName: Use `java.security.cert` instead of `javax.security.cert`
 description: The `javax.security.cert` package has been deprecated for removal.

src/main/resources/META-INF/rewrite/java-version-21.yml

@@ -25,7 +25,8 @@ tags:
   - java21
 recipeList:
   - org.openrewrite.java.migrate.UpgradeToJava17
-  - org.openrewrite.java.migrate.JavaVersion21
+  - org.openrewrite.java.migrate.UpgradeJavaVersion:
+      version: 21
   - org.openrewrite.java.migrate.RemoveIllegalSemicolons
   - org.openrewrite.java.migrate.lang.ThreadStopUnsupported
   - org.openrewrite.java.migrate.net.URLConstructorsToURIRecipes
@@ -61,17 +62,6 @@ recipeList:
 
 ---
 type: specs.openrewrite.org/v1beta/recipe
-name: org.openrewrite.java.migrate.JavaVersion21
-displayName: Change Maven Java version property values to 21
-description: Change maven.compiler.source and maven.compiler.target values to 21.
-tags:
-  - java21
-  - compiler
-recipeList:
-  - org.openrewrite.java.migrate.UpgradeJavaVersion:
-      version: 21
----
-type: specs.openrewrite.org/v1beta/recipe
 name: org.openrewrite.java.migrate.util.SequencedCollection
 displayName: Adopt `SequencedCollection`
 description: Replace older code patterns with `SequencedCollection` methods, as per https://openjdk.org/jeps/431.

src/test/java/org/openrewrite/java/migrate/UpdateMavenToJava11Test.java

@@ -183,6 +183,30 @@ void gradleSourceTargetFromJava11ToJava17() {
             );
         }
 
+        @Test
+        void gradleSourceTargetFromJava11ToJava21ThroughEnum() {
+            rewriteRun(
+              spec -> spec.recipe(new UpgradeJavaVersion(21)),
+              buildGradle(
+                //language=groovy
+                """
+                  java {
+                    sourceCompatibility = JavaVersion.VERSION_11
+                    targetCompatibility = JavaVersion.VERSION_11
+                  }
+                  """,
+                //language=groovy
+                """
+                  java {
+                    sourceCompatibility = JavaVersion.VERSION_21
+                    targetCompatibility = JavaVersion.VERSION_21
+                  }
+                  """,
+                spec -> spec.markers(new JavaVersion(UUID.randomUUID(), "", "", "11.0.15+10", "11.0.15+10"))
+              )
+            );
+        }
+
         @Test
         void gradleNoChangeIfUpgradeFromJava11ToJava8() {
             rewriteRun(