Use GET() and PUT() instead of method() (#740)

But this does not work for `HEAD()` that is 18+.

Moreover, builder `method(String, BodyPublisher)` enforces body publisher as non-null, while the logic to stop emitting `Content-Length: 0` on GET and HEAD expects `null` body publisher.

This fixes:
* GET as it uses dedicated `GET()` method on builder that will use `null` body publisher (and JDK bugfix will work)
* PUT as it uses dedicated `PUT()` method on builder
* but does not fix HEAD (and as I see, it will be still emitted with `Content-Length: 0`, but may be wrong). Fixing HEAD is not possible, as dedicated `HEAD()` method was added in java 18, while the existing `method(String, BodyPublisher)` enforces non-null publisher.

Fixes #739

Author: cstamas

maven-resolver-transport-jdk-parent/maven-resolver-transport-jdk-11/src/main/java/org/eclipse/aether/transport/jdk/JdkTransporter.java

@@ -272,7 +272,7 @@ protected void implGet(GetTask task) throws Exception {
         try {
             while (true) {
                 HttpRequest.Builder request =
-                        HttpRequest.newBuilder().uri(resolve(task)).method("GET", HttpRequest.BodyPublishers.noBody());
+                        HttpRequest.newBuilder().uri(resolve(task)).GET();
                 headers.forEach(request::setHeader);
 
                 if (resume) {
@@ -395,7 +395,7 @@ protected void implPut(PutTask task) throws Exception {
         headers.forEach(request::setHeader);
         try (FileUtils.TempFile tempFile = FileUtils.newTempFile()) {
             utilPut(task, Files.newOutputStream(tempFile.getPath()), true);
-            request.method("PUT", HttpRequest.BodyPublishers.ofFile(tempFile.getPath()));
+            request.PUT(HttpRequest.BodyPublishers.ofFile(tempFile.getPath()));
 
             try {
                 HttpResponse<Void> response = send(request.build(), HttpResponse.BodyHandlers.discarding());