Add 'force' option to SRE teardown

[jemrobinson]

✅ Checklist

• You have given your pull request a meaningful title (e.g. Enable foobar integration rather than 515 foobar).
• You are targeting the appropriate branch. If you're not certain which one this is, it should be develop.
• Your branch is up-to-date with the target branch (it probably was when you started, but it may have changed since then).

🚦 Depends on

n/a

⤴️ Summary

• Adds --force option to SRE teardown
• Adds tests for dsh sre X commands

🌂 Related issues

Closes #1932

🔬 Tests

Not tested

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
data_safe_haven/commands
sre.py
data_safe_haven/infrastructure
project_manager.py					283-286, 361-362
Project Total

This report was generated by python-coverage-comment-action

[JimMadge]

LGTM.

One suggestion for further work or a new issue.