Certificates renewal migration

[abachleda-baca]

👀 Purpose

• Migration of Certificate Expiry Check code from https://github.com/ministryofjustice/operations-engineering-certificate-renewal/

♻️ What's Changed

• Job script certificate_expiry_check.py moved to operations-engineering/bin
• Services updated accordingly
• Test run workflow added
• All required secrets added to the repo.

📝 Notes

#4927

• Certificate Expiry Test Run: https://github.com/ministryofjustice/operations-engineering/actions/runs/11630817758

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✅ Things to Check (Optional)

• I have run all unit tests, and they pass.
• I have ensured my code follows the project's coding standards.
• I have checked that all new dependencies are up to date and necessary.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	2		0	0.04s
✅ PYTHON	flake8	4		0	0.53s
✅ PYTHON	isort	4	4	0	0.33s
✅ PYTHON	pylint	4		0	2.91s
✅ REPOSITORY	gitleaks	yes		no	1.69s
✅ YAML	prettier	2	1	0	0.47s
✅ YAML	yamllint	2		0	0.32s

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