[SPARK-46027][INFRA] Add Python 3.12 to the Daily Python Github Action job

### What changes were proposed in this pull request?

This PR aims to enable `Python 3.12` testing in the following daily `Python-only` Github Action job.

https://github.com/apache/spark/actions/workflows/build_python.yml

### Why are the changes needed?

To provide `Python 3.12` test coverage to Apache Spark 4.0.0.

Since SPARK-46020 installed `Python 3.12` into the infra image, what we need is to add it to the daily job.
- #43922

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

We need to validate this in the daily GitHub Action job.

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #43929 from HyukjinKwon/SPARK-46027.

Authored-by: Hyukjin Kwon <[email protected]>
Signed-off-by: Hyukjin Kwon <[email protected]>

Author: HyukjinKwon

Diff for: .github/workflows/build_python.yml

@@ -17,7 +17,7 @@
 # under the License.
 #
 
-name: "Build / Python-only (master, PyPy 3.8/Python 3.10/Python 3.11)"
+name: "Build / Python-only (master, PyPy 3.8/Python 3.10/Python 3.11/Python 3.12)"
 
 on:
   schedule:
@@ -36,7 +36,7 @@ jobs:
       hadoop: hadoop3
       envs: >-
         {
-          "PYTHON_TO_TEST": "pypy3,python3.10,python3.11"
+          "PYTHON_TO_TEST": "pypy3,python3.10,python3.11.python3.12"
         }
       jobs: >-
         {