[PM-11404] Account Deprovisioning: Prevent a verified user from purging their vault

[r-tome]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-11404

📔 Objective

If the Account Deprovisioning feature flag is enabled then prevent organization managed users from purging their vault.

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 41.57%. Comparing base (a1e4e47) to head (2654a17).

Files with missing lines	Patch %	Lines
src/Api/Vault/Controllers/CiphersController.cs	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4853      +/-   ##
==========================================
- Coverage   41.57%   41.57%   -0.01%     
==========================================
  Files        1357     1357              
  Lines       64056    64060       +4     
  Branches     5891     5892       +1     
==========================================
  Hits        26631    26631              
- Misses      36208    36212       +4     
  Partials     1217     1217              

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[github-actions]

Checkmarx One – Scan Summary & Details – 258b4cef-f4d7-44c2-b165-652997f244dd

New Issues

Severity	Issue	Source File / Package	Checkmarx Insight
	Missing_HSTS_Header	/src/Admin/Startup.cs: 41	Attack Vector

Fixed Issues

Severity	Issue	Source File / Package
	CSRF	/src/Billing/Controllers/StripeController.cs: 176
	CSRF	/src/Billing/Controllers/StripeController.cs: 164
	CSRF	/src/Admin/AdminConsole/Controllers/ProvidersController.cs: 274