[Core] Added support for submission-time task names. (#10449)

* Added support for submission-time task names.

* Suggestions from code review: add missing consts

Co-authored-by: SangBin Cho <rkooo567@gmail.com>

* Add num_returns arg to actor method options docstring example.

* Add process name line and proctitle assertion to submission-time task name section of advanced docs.

* Add submission-time task name --> proctitle test for Python worker.

* Added Python actor options tests for num_returns and name.

* Added Java test for submission-time task names.

* Add dashboard image to task name docs section.

* Move to fstrings.

Co-authored-by: SangBin Cho <rkooo567@gmail.com>

java/test/src/main/java/io/ray/test/TaskNameTest.java

@@ -0,0 +1,19 @@
+package io.ray.test;
+
+import io.ray.api.Ray;
+import org.testng.Assert;
+import org.testng.annotations.Test;
+
+/** Task Name Test. */
+public class TaskNameTest extends BaseTest {
+
+  private static int testFoo() {
+    return 0;
+  }
+
+  /** Test setting task name at task submission time. */
+  @Test
+  public void testSetName() {
+    Assert.assertEquals(0, (int) Ray.task(TaskNameTest::testFoo).setName("foo").remote().get());
+  }
+}