### What changes were proposed in this pull request?
This PR proposes:
- Respect `PYSPARK_PYTHON` and `PYSPARK_DRIVER_PYTHON` environment variables, or `spark.pyspark.python` and `spark.pyspark.driver.python` configurations in Kubernates just like other cluster types in Spark.
- Depreate `spark.kubernetes.pyspark.pythonVersion` and guide users to set the environment variables and configurations for Python executables.
NOTE that `spark.kubernetes.pyspark.pythonVersion` is already a no-op configuration without this PR. Default is `3` and other values are disallowed.
- In order for Python executable settings to be consistently used, fix `spark.archives` option to unpack into the current working directory in the driver of Kubernates' cluster mode. This behaviour is identical with Yarn's cluster mode. By doing this, users can leverage Conda or virtuenenv in cluster mode as below:
```python
conda create -y -n pyspark_conda_env -c conda-forge pyarrow pandas conda-pack
conda activate pyspark_conda_env
conda pack -f -o pyspark_conda_env.tar.gz
PYSPARK_PYTHON=./environment/bin/python spark-submit --archives pyspark_conda_env.tar.gz#environment app.py
```
- Removed several unused or useless codes such as `extractS3Key` and `renameResourcesToLocalFS`
### Why are the changes needed?
- To provide a consistent support of PySpark by using `PYSPARK_PYTHON` and `PYSPARK_DRIVER_PYTHON` environment variables, or `spark.pyspark.python` and `spark.pyspark.driver.python` configurations.
- To provide Conda and virtualenv support via `spark.archives` options.
### Does this PR introduce _any_ user-facing change?
Yes:
- `spark.kubernetes.pyspark.pythonVersion` is deprecated.
- `PYSPARK_PYTHON` and `PYSPARK_DRIVER_PYTHON` environment variables, and `spark.pyspark.python` and `spark.pyspark.driver.python` configurations are respected.
### How was this patch tested?
Manually tested via:
```bash
minikube delete
minikube start --cpus 12 --memory 16384
kubectl create namespace spark-integration-test
cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: ServiceAccount
metadata:
name: spark
namespace: spark-integration-test
EOF
kubectl create clusterrolebinding spark-role --clusterrole=edit --serviceaccount=spark-integration-test:spark --namespace=spark-integration-test
dev/make-distribution.sh --pip --tgz -Pkubernetes
resource-managers/kubernetes/integration-tests/dev/dev-run-integration-tests.sh --spark-tgz `pwd`/spark-3.2.0-SNAPSHOT-bin-3.2.0.tgz --service-account spark --namespace spark-integration-test
```
Unittests were also added.
Closes#30735 from HyukjinKwon/SPARK-33748.
Authored-by: HyukjinKwon <gurwls223@apache.org>
Signed-off-by: HyukjinKwon <gurwls223@apache.org>
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