[16.0][FIX] cron_daylight_saving_time_resistant: Keep test savepoint

[SirAionTech]

Fix the following:

This module seems to be causing test failures in recent PRs:

 2024-03-22 11:59:44,139 390 ERROR odoo odoo.addons.cron_daylight_saving_time_resistant.tests.test_dst: ERROR: TestDST.test_cron
Traceback (most recent call last):
  File "/opt/odoo/odoo/sql_db.py", line 176, in __exit__
    self.commit()
  File "/opt/odoo/odoo/sql_db.py", line 558, in commit
    self._savepoint.close(rollback=False)
  File "/opt/odoo/odoo/sql_db.py", line 86, in close
    self._close(rollback)
  File "/opt/odoo/odoo/sql_db.py", line 94, in _close
    self._cr.execute(SQL('RELEASE SAVEPOINT {}').format(self._name))
  File "/opt/odoo/odoo/sql_db.py", line 321, in execute
    res = self._obj.execute(query, params)
psycopg2.errors.InvalidSavepointSpecification: savepoint "13b0b903-3992-11ec-965e-5f38e53695a9" does not exist


During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/__w/server-tools/server-tools/cron_daylight_saving_time_resistant/tests/test_dst.py", line 71, in test_cron
    self._check_cron_date_after_run(cron, "2021-10-30 15:00:00")
  File "/__w/server-tools/server-tools/cron_daylight_saving_time_resistant/tests/test_dst.py", line 43, in _check_cron_date_after_run
    registry["ir.cron"]._process_job(db, new_cr, job)
  File "/__w/server-tools/server-tools/cron_daylight_saving_time_resistant/models/ir_cron.py", line 48, in _process_job
    with cls.pool.cursor() as job_cr:
  File "/opt/odoo/odoo/sql_db.py", line 178, in __exit__
    self.close()
  File "/opt/odoo/odoo/sql_db.py", line 540, in close
    self.rollback()
  File "/opt/odoo/odoo/sql_db.py", line 571, in rollback
    self._savepoint.rollback()
  File "/opt/odoo/odoo/sql_db.py", line 89, in rollback
    self._cr.execute(SQL('ROLLBACK TO SAVEPOINT {}').format(self._name))
  File "/opt/odoo/odoo/sql_db.py", line 321, in execute
    res = self._obj.execute(query, params)
psycopg2.errors.InvalidSavepointSpecification: savepoint "13b0b903-3992-11ec-965e-5f38e53695a9" does not exist

https://github.com/OCA/server-tools/actions/runs/8389895772/job/22977050191?pr=2887

Would you be so kind as to have a look?

Originally posted by @StefanRijnhart in #2578 (comment)

This is causing tests failure for every 16.0-based PR.

[OCA-git-bot]

Hi @florian-dacosta,
some modules you are maintaining are being modified, check this out!

[StefanRijnhart]

Thanks for making the branch green again!

[StefanRijnhart]

/ocabot merge patch

[OCA-git-bot]

On my way to merge this fine PR!
Prepared branch 16.0-ocabot-merge-pr-2899-by-StefanRijnhart-bump-patch, awaiting test results.

[OCA-git-bot]

Congratulations, your PR was merged at d416428. Thanks a lot for contributing to OCA. ❤️