vendor croniter (#27045)

Summary:
The author of croniter has stated their intention to abandon the project
and potentially remove it from PyPI. Guard against future breakages by
vendoring.

Test Plan: BK

## Changelog
The `croniter` package is now vendored in dagster.

docs/sphinx/conf.py

@@ -97,7 +97,6 @@
     "airflow",
     "azure",
     "coloredlogs",
-    "croniter",
     "dask",
     "databricks",
     "databricks_api",

python_modules/dagster/MANIFEST.in

@@ -3,6 +3,7 @@ include LICENSE
 include COPYING
 include dagster/py.typed
 include dagster/_grpc/__generated__/api_pb2.pyi
+include dagster/_vendored/croniter/LICENSE
 include dagster/_vendored/dateutil/LICENSE
 exclude python_modules/dagster/dagster/_core/types/ruff.toml
 recursive-include dagster *.md

python_modules/dagster/dagster/_utils/schedules.py

@@ -6,11 +6,10 @@
 from collections.abc import Iterator, Sequence
 from typing import Optional, Union
 
-from croniter import croniter as _croniter
-
 import dagster._check as check
 from dagster._core.definitions.partition import ScheduleType
 from dagster._time import get_timezone
+from dagster._vendored.croniter import croniter as _croniter
 from dagster._vendored.dateutil.relativedelta import relativedelta
 from dagster._vendored.dateutil.tz import datetime_ambiguous, datetime_exists
 

python_modules/dagster/dagster/_vendored/README.md

@@ -7,6 +7,7 @@ A package could be a good candidate for vendoring if it is relatively small and
 Currently vendored packages:
 
 - dateutil is vendored at the 2.9.0post0 release: https://pypi.org/project/python-dateutil/2.9.0.post0/ due to being frequently imported from two different pypi packages, https://pypi.org/project/python-dateutil/ and https://pypi.org/project/py-dateutil/, sometimes simultaneously (including in the default AWS EMR python environment as of June 2024)
+- croniter is vendored at the 6.0.0 release: https://pypi.org/project/croniter/6.0.0/ due to the author planning to remove it from PyPI.
 
 To vendor a package:
 

python_modules/dagster/dagster/_vendored/croniter/LICENSE

@@ -0,0 +1,7 @@
+Copyright (C) 2010-2012 Matsumoto Taichi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

python_modules/dagster/dagster/_vendored/croniter/__init__.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+
+from . import croniter as cron_m
+from .croniter import (
+    DAY_FIELD,
+    HOUR_FIELD,
+    MINUTE_FIELD,
+    MONTH_FIELD,
+    OVERFLOW32B_MODE,
+    SECOND_FIELD,
+    UTC_DT,
+    YEAR_FIELD,
+    CroniterBadCronError,
+    CroniterBadDateError,
+    CroniterBadTypeRangeError,
+    CroniterError,
+    CroniterNotAlphaError,
+    CroniterUnsupportedSyntaxError,
+    croniter,
+    croniter_range,
+    datetime_to_timestamp,
+)
+
+croniter.__name__  # make flake8 happy