create_fake_backend: tool for creating fake backend files and settings

[1ucian0]

(moving https://github.com/Qiskit/qiskit/pull/8466 here)

This script creates the file for setting a new fake backend, including inserting the lines around and the release note.

python ./tools/create_fake_backend.py --hub <redacted> oslo ibm_oslo
python ./tools/update_fake_backends.py --hub <redacted> ibm_oslo

[coveralls]

Pull Request Test Coverage Report for Build 7114501305

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 46.45%

---

Totals
Change from base Build 7108062788:	0.0%
Covered Lines:	2329
Relevant Lines:	5014

---

💛 - Coveralls

[kt474]

This PR is 6 months old, is it ok to close for now and reopen if necessary?

[kt474]

Closing, feel free to reopen