Build with tests running on Windows

* Fix test-projects content for testing on Win

* Majority of tests fixes on Win

* Maven wrapper to maven 3.9.9

* Doc URI changes for Win to revisit. All tests pass

* Disable a few tests on Win until JDT Core 3.41

* Wrap up questionable changes

Author: BoykoAlex

headless-services/.mvn/wrapper/maven-wrapper.jar

@@ -14,5 +14,6 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
-distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.6/apache-maven-3.9.6-bin.zip
-wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar
+wrapperVersion=3.3.2
+distributionType=only-script
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.9/apache-maven-3.9.9-bin.zip

headless-services/.mvn/wrapper/maven-wrapper.properties

@@ -10,6 +10,7 @@
  *******************************************************************************/
 package org.springframework.ide.vscode.languageserver.testharness;
 
+import java.io.File;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 
@@ -19,10 +20,12 @@
 
 public class ClasspathTestUtil {
 
+	public static final String MAIN_JAVA = "main" + File.separatorChar + "java";
+
 	public static Path getOutputFolder(IJavaProject jp) throws Exception {
 		for (CPE cpe : jp.getClasspath().getClasspathEntries()) {
 			if (Classpath.isSource(cpe)) {
-				if (cpe.getPath().endsWith("main/java")) {
+				if (cpe.getPath().endsWith(MAIN_JAVA)) {
 					return Paths.get(cpe.getOutputFolder());
 				}
 			}

headless-services/commons/language-server-test-harness/src/main/java/org/springframework/ide/vscode/languageserver/testharness/ClasspathTestUtil.java

@@ -766,7 +766,7 @@ public String createTempUri(String extension) throws Exception {
 		if (extension == null) {
 			extension = getFileExtension();
 		}
-		return File.createTempFile("workingcopy", extension).toURI().toASCIIString();
+		return File.createTempFile("workingcopy", extension).toPath().toUri().toASCIIString();
 	}
 
 	public void assertCompletion(String textBefore, String expectTextAfter) throws Exception {