Register dagster-polars in DagsterLibraryRegistry (#19910)

## Summary & Motivation

Community PR adding dagster-polars was merged but did not add it to
`DagsterLibraryRegistry`, causing a failure on BK.

python_modules/automation/automation_tests/telemetry/test_resource_telemetry.py

@@ -27,7 +27,7 @@ def test_resource_telemetry():
     libraries = [
         library.name.replace("-", "_")
         for library in os.scandir(libraries_dir)
-        if not library.name.endswith("CONTRIBUTING.md")
+        if not (library.name.startswith(".") or library.name.endswith("CONTRIBUTING.md"))
     ]
     libraries.append("dagster")
 

python_modules/automation/automation_tests/test_repo.py

@@ -11,7 +11,7 @@ def test_all_libraries_register() -> None:
     assert str(library_dir).endswith("python_modules/libraries")
 
     for library in os.listdir(library_dir):
-        if library.endswith("CONTRIBUTING.md"):
+        if library.startswith(".") or library.endswith("CONTRIBUTING.md"):
             continue
         result = subprocess.run(["grep", register_call, (library_dir / library), "-r"], check=False)
         assert (

python_modules/automation/tox.ini

@@ -57,6 +57,7 @@ deps =
   -e ../libraries/dagster-snowflake-pandas
   -e ../libraries/dagster-snowflake-pyspark
   -e ../libraries/dagster-pandera
+  -e ../libraries/dagster-polars
   -e .
 
   # This is a temporary pin due to version conflicts between dbt 1.6 and some higher-order

python_modules/libraries/dagster-polars/dagster_polars/__init__.py

@@ -1,3 +1,5 @@
+from dagster._core.libraries import DagsterLibraryRegistry
+
 from dagster_polars.io_managers.base import BasePolarsUPathIOManager
 from dagster_polars.io_managers.parquet import PolarsParquetIOManager
 from dagster_polars.types import (
@@ -44,3 +46,5 @@
     __all__.extend(["PolarsBigQueryIOManager", "PolarsBigQueryTypeHandler"])
 except ImportError:
     pass
+
+DagsterLibraryRegistry.register("dagster-gcp", __version__)