Rename jobs_v2.py to jobs.py

Now that the legacy schema-wide jobs system has been removed,
rename the new per-table jobs module to its canonical name:

- src/datajoint/jobs_v2.py -> src/datajoint/jobs.py
- tests/test_jobs_v2.py -> tests/test_jobs.py
- Update imports in autopopulate.py and test_jobs.py

Author: claude

src/datajoint/autopopulate.py

@@ -171,7 +171,7 @@ def jobs(self):
         :return: JobsTable instance for this table
         """
         if self._jobs_table is None:
-            from .jobs_v2 import JobsTable
+            from .jobs import JobsTable
 
             self._jobs_table = JobsTable(self.target)
         return self._jobs_table

src/datajoint/jobs_v2.py src/datajoint/jobs.pysrc/datajoint/jobs_v2.py renamed to src/datajoint/jobs.py

@@ -6,7 +6,7 @@
 import string
 
 import datajoint as dj
-from datajoint.jobs_v2 import JobsTable, ERROR_MESSAGE_LENGTH, TRUNCATION_APPENDIX
+from datajoint.jobs import JobsTable, ERROR_MESSAGE_LENGTH, TRUNCATION_APPENDIX
 
 from . import schema