[KYUUBI #6593] bin/kyuubi supports kill command

# 🔍 Description
## Issue References 🔗

This pull request fixes #6593

## Describe Your Solution 🔧

The `kill -9 $PID` command directly forces Kyuubi to be shut down.

## Types of changes 🔖

- [ ] Bugfix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to change)

## Test Plan 🧪

#### Behavior With This Pull Request 🎉
```
(base) $ bin/kyuubi kill
Stopping org.apache.kyuubi.server.KyuubiServer forcefully.

            __  __                            __
           /` \/` \                          /` \       __
           \ \ \/ /    __  __  __  __   __ __\ \ \____ /\_\
            \ \ , <   /` \/` \/` \/` \/` \/` \\ \ \__` \/` \
             \ \ \ \`\\ \ \_\ \\ \_\  \\ \_\  \\ \ \L\  \ \ \
              \ \_\ \_ \/`____ \ \____/ \ \____`\ \_,__/ \ \_\
               \/_/\/_/ `/___/> \/___/   \/___/  \/___/   \/_/
                           /\___/
                           \/__\/

Bye!
```

---

# Checklist 📝

- [x] This patch was not authored or co-authored using [Generative Tooling](https://www.apache.org/legal/generative-tooling.html)

**Be nice. Be informative.**

Closes #6611 from BruceWong96/kyuubi_kill_command.

Closes #6593

00f8c4c [Kent Yao] Update bin/kyuubi
b27cd1a [Bruce Wong] fix indent.
d2f3fc4 [Bruce Wong] add kyuubi kill command.

Lead-authored-by: Bruce Wong <[email protected]>
Co-authored-by: Kent Yao <[email protected]>
Signed-off-by: Kent Yao <[email protected]>

bin/kyuubi

@@ -26,6 +26,7 @@ function usage() {
   echo "    restart      - Restart Kyuubi server as a daemon"
   echo "    run          - Run a Kyuubi server in the foreground"
   echo "    stop         - Stop the Kyuubi daemon"
+  echo "    kill         - Stop the Kyuubi daemon forcefully"
   echo "    status       - Show status of the Kyuubi daemon"
   echo "    -h | --help  - Show this help message"
 }
@@ -107,7 +108,7 @@ if [[ -n ${YARN_CONF_DIR} ]]; then
   KYUUBI_CLASSPATH="${KYUUBI_CLASSPATH}:${YARN_CONF_DIR}"
 fi
 
-if [[ "$1" =~ ^(start|restart|run|stop|status)$ ]]; then
+if [[ "$1" =~ ^(start|restart|run|stop|kill|status)$ ]]; then
     command=$1
     shift
 fi
@@ -215,6 +216,18 @@ function stop_kyuubi() {
   fi
 }
 
+function kill_kyuubi() {
+  if [ -f ${pid} ]; then
+    TARGET_ID="$(cat "$pid")"
+    echo "Stopping $CLASS forcefully."
+    kill -9 $TARGET_ID
+    kyuubi_logo
+    echo "Bye!"
+  else
+    echo "no $CLASS to stop"
+  fi
+}
+
 function check_kyuubi() {
   if [[ -f ${pid} ]]; then
     TARGET_ID="$(cat "$pid")"
@@ -247,6 +260,10 @@ case $command in
     stop_kyuubi
     ;;
 
+  (kill)
+    kill_kyuubi
+    ;;
+
   (status)
     check_kyuubi
     ;;