Geostats Functions in Spark Connect

I don't think the stats functions are compatible with spark connect today. I tried this in spark 3.5:

```
(python) ➜ python git:(graphframes-0.9.0) ✗ export SPARK_REMOTE=local
(python) ➜ python git:(graphframes-0.9.0) ✗ pytest -v tests/stats
```

and every test that wasn't skipped (for checkpointing) gave this kind of _jvm error:

```
self = , name = '_jvm'

def __getattr__(self, name: str) -> Any:
if name in ["_jsc", "_jconf", "_jvm", "_jsparkSession"]:
> raise PySparkAttributeError(
error_class="JVM_ATTRIBUTE_NOT_SUPPORTED", message_parameters={"attr_name": name}
E pyspark.errors.exceptions.base.PySparkAttributeError: [JVM_ATTRIBUTE_NOT_SUPPORTED] Attribute `_jvm` is not supported in Spark Connect as it depends on the JVM. If you need to use this attribute, do not use Spark Connect when creating your session.

../../../../.local/share/virtualenvs/python-GYLC1Bm8/lib/python3.10/site-packages/pyspark/sql/connect/session.py:692: PySparkAttributeError

```

Start by running `pytest -v tests/stats` with `SPARK_REMOTE=local`, as reported in the issue. Review the stats tests and the `_jvm` failure in Spark Connect; done means the applicable stats tests run successfully without JVM-dependent errors.

Written by the indexing model from the issue text.