Fix ciphers & collections using wrong key when decrypting

[Hinton]

📔 Objective

In #738 we migrated away from decrypt and used decrypt_with_key instead. However ciphers can be encrypted using either organization keys or user key. The changes introduced meant we always used the users key instead of conditionally based on the value of organization_jd in Cipher.

The fix was to call locate_key on Cipher and Collection.

To properly write tests I needed to mock a user account and organization. I took this moment to refactor our tests account and we now have nice helpers for initializing the [email protected] account, which also includes an organization.

⏰ 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

[github-actions]

Checkmarx One – Scan Summary & Details – 04ee2ccf-725e-40d9-8b55-7b52651e9d78

No New Or Fixed Issues Found

[codecov]

Codecov Report

Attention: Patch coverage is 93.65079% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 59.44%. Comparing base (9eb4237) to head (2483b5d).

Files	Patch %	Lines
...rates/bitwarden/src/mobile/vault/client_ciphers.rs	88.88%	6 Missing ⚠️
crates/bitwarden/src/client/test_accounts.rs	93.93%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #812      +/-   ##
==========================================
+ Coverage   58.02%   59.44%   +1.42%     
==========================================
  Files         179      180       +1     
  Lines       11634    11753     +119     
==========================================
+ Hits         6751     6987     +236     
+ Misses       4883     4766     -117     

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