Only disable test tasks when a project isn't compatible with toolchain

Disabling compilation means that any downstream project will break.
For example, disabling our Gradle plugin's compileJava task means
that the launch script test app fails to build as it uses our
Gradle plugin and its classes are missing.

See gh-gh-32280

buildSrc/src/main/java/org/springframework/boot/build/toolchain/ToolchainPlugin.java

@@ -23,8 +23,6 @@
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
 import org.gradle.api.plugins.JavaPluginExtension;
-import org.gradle.api.tasks.compile.JavaCompile;
-import org.gradle.api.tasks.javadoc.Javadoc;
 import org.gradle.api.tasks.testing.Test;
 import org.gradle.jvm.toolchain.JavaLanguageVersion;
 import org.gradle.jvm.toolchain.JavaToolchainSpec;
@@ -67,8 +65,6 @@ private boolean isJavaVersionSupported(ToolchainExtension toolchain, JavaLanguag
 	}
 
 	private void disableToolchainTasks(Project project) {
-		project.getTasks().withType(JavaCompile.class, (task) -> task.setEnabled(false));
-		project.getTasks().withType(Javadoc.class, (task) -> task.setEnabled(false));
 		project.getTasks().withType(Test.class, (task) -> task.setEnabled(false));
 	}