[SPARK-44298][BUILD] Disable PySpark test on the daily test of Java 2…

…1 before the new arrow version release

### What changes were proposed in this pull request?
The pr aims to disable PySpark test on the daily test of Java 21 before the new arrow version release.

### Why are the changes needed?
Make daily testing runs based on Java21 successful.

### Does this PR introduce _any_ user-facing change?
No.

### How was this patch tested?
Pass GA.

Closes apache#41826 from panbingkun/skip_python_test_java21.

Authored-by: panbingkun <pbk1982@gmail.com>
Signed-off-by: yangjie01 <yangjie01@baidu.com>

.github/workflows/build_java21.yml

@@ -42,7 +42,7 @@ jobs:
       jobs: >-
         {
           "build": "true",
-          "pyspark": "true",
+          "pyspark": "false",
           "sparkr": "true",
           "tpcds-1g": "true",
           "docker-integration-tests": "true"