Update default_module_mapping.py to add snowflake's snowpark (pantsbu…

…ild#19671)

Very common in the snowflake world. Deserves a default mapping, imo.

Tested locally with an entry in BUILD like:
```python
python_requirements(
    name="dag",
    resolve="dag",
    source="dag-requirements.txt",
    module_mapping={
        "snowflake-snowpark-python": ("snowflake.snowpark",),
        "google-cloud-datastream": ("google.cloud.datastream",),
        "google-cloud-spanner": ("google.cloud.spanner",),
    }
)
```

src/python/pants/backend/python/dependency_inference/default_module_mapping.py

@@ -98,13 +98,15 @@
     "google-cloud-bigquery": ("google.cloud.bigquery",),
     "google-cloud-bigtable": ("google.cloud.bigtable",),
     "google-cloud-datastore": ("google.cloud.datastore",),
+    "google-cloud-datastream": ("google.cloud.datastream",),
     "google-cloud-firestore": ("google.cloud.firestore",),
     "google-cloud-functions": ("google.cloud.functions_v1", "google.cloud.functions"),
     "google-cloud-iam": ("google.cloud.iam_credentials_v1",),
     "google-cloud-iot": ("google.cloud.iot_v1",),
     "google-cloud-logging": ("google.cloud.logging_v2", "google.cloud.logging"),
     "google-cloud-pubsub": ("google.cloud.pubsub_v1", "google.cloud.pubsub"),
     "google-cloud-secret-manager": ("google.cloud.secretmanager",),
+    "google-cloud-spanner": ("google.cloud.spanner",),
     "google-cloud-storage": ("google.cloud.storage",),
     "graphql-core": ("graphql",),
     "grpcio": ("grpc",),
@@ -238,6 +240,7 @@
     "sseclient-py": ("sseclient",),
     "setuptools": ("easy_install", "pkg_resources", "setuptools"),
     "snowflake-connector-python": ("snowflake.connector",),
+    "snowflake-snowpark-python": ("snowflake.snowpark",),
     "snowflake-sqlalchemy": ("snowflake.sqlalchemy",),
     "strawberry-graphql": ("strawberry",),
     "streamlit-aggrid": ("st_aggrid",),