[KYUUBI #1797] Only exposing jdbc url for server side

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### _Why are the changes needed?_
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Only exposing the jdbc url in server side, it is not needed to expose it in engine side and also not secure.

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [ ] [Run test](https://kyuubi.readthedocs.io/en/latest/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #1797 from turboFei/hide_url.

Closes #1797

f696b141 [Fei Wang] Only exposing jdbc url for server

Authored-by: Fei Wang <fwang12@ebay.com>
Signed-off-by: ulysses-you <ulyssesyou@apache.org>

kyuubi-common/src/main/scala/org/apache/kyuubi/service/TBinaryFrontendService.scala

@@ -100,7 +100,9 @@ abstract class TBinaryFrontendService(name: String)
 
   override def run(): Unit =
     try {
-      info(s"Starting and exposing JDBC connection at: jdbc:hive2://$connectionUrl/")
+      if (isServer()) {
+        info(s"Starting and exposing JDBC connection at: jdbc:hive2://$connectionUrl/")
+      }
       server.foreach(_.serve())
     } catch {
       case _: InterruptedException => error(s"$getName is interrupted")
@@ -113,4 +115,6 @@ abstract class TBinaryFrontendService(name: String)
     server.foreach(_.stop())
     server = None
   }
+
+  protected def isServer(): Boolean = false
 }

kyuubi-server/src/main/scala/org/apache/kyuubi/server/KyuubiTBinaryFrontendService.scala

@@ -72,4 +72,6 @@ final class KyuubiTBinaryFrontendService(
   override protected def oomHook: Runnable = {
     () => serverable.stop()
   }
+
+  override protected def isServer(): Boolean = true
 }