Reduce printed warnings in builds

There are a lot of "[WARNING] Using JavaSE-21 to fulfill requested
profile of JavaSE-17. This might lead to faulty dependency resolution,
consider defining a suitable JDK in the toolchains.xml." in builds if no
toolchain.xml  is defined. But with modular JVMs even having same EE
version doesn't guarantee same APIs are available in the JVM thus
reducing severity of the message to debug so it can still be printed for
the rare cases when that might be useful.

tycho-core/src/main/java/org/eclipse/tycho/core/ee/ExecutionEnvironmentUtils.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2008, 2022 Sonatype Inc. and others.
+ * Copyright (c) 2008, 2024 Sonatype Inc. and others.
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
@@ -32,8 +32,8 @@
 import org.codehaus.plexus.logging.Logger;
 import org.eclipse.osgi.internal.framework.EquinoxConfiguration;
 import org.eclipse.tycho.ExecutionEnvironment;
-import org.eclipse.tycho.TargetEnvironment;
 import org.eclipse.tycho.ExecutionEnvironment.SystemPackageEntry;
+import org.eclipse.tycho.TargetEnvironment;
 import org.eclipse.tycho.core.ee.StandardExecutionEnvironment.JavaInfo;
 import org.osgi.framework.BundleActivator;
 import org.osgi.framework.Constants;
@@ -64,11 +64,11 @@ private static Properties readProperties(final URL url) {
      * Get the execution environment for the specified OSGi profile name.
      * 
      * @param profileName
-     *            profile name value as specified for key "Bundle-RequiredExecutionEnvironment" in
-     *            MANIFEST.MF
+     *                        profile name value as specified for key
+     *                        "Bundle-RequiredExecutionEnvironment" in MANIFEST.MF
      * @return the corresponding {@link ExecutionEnvironment}.
      * @throws UnknownEnvironmentException
-     *             if profileName is unknown.
+     *                                         if profileName is unknown.
      */
     public static StandardExecutionEnvironment getExecutionEnvironment(String profileName, ToolchainManager manager,
             MavenSession session, Logger logger) throws UnknownEnvironmentException {
@@ -87,7 +87,7 @@ public static StandardExecutionEnvironment getExecutionEnvironment(String profil
                         return split[0] + "-" + v;
                     }).map(map::get).filter(Objects::nonNull).findFirst().orElse(null);
             if (higherEE != null) {
-                logger.warn("Using " + higherEE.getProfileName() + " to fulfill requested profile of " + profileName
+                logger.debug("Using " + higherEE.getProfileName() + " to fulfill requested profile of " + profileName
                         + ". This might lead to faulty dependency resolution, consider defining a suitable JDK in the toolchains.xml.");
                 return getSurrogate(profileName, higherEE);
             }