Flip the dependency between exporters and vault

[Hinton]

📔 Objective

In preparation for #798 we need to flip the relationship between vault and exporters. Due to exporters in the future getting a client_exporters which means they need to be able to access the vault models to properly model it.

⏰ 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[bot]]

Checkmarx One – Scan Summary & Details – 15e5a497-ed64-41a0-bc48-353c05bf787b

No New Or Fixed Issues Found

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 28.57143% with 10 lines in your changes missing coverage. Please review.

Project coverage is 59.24%. Comparing base (dfd0ba8) to head (8f6ebf6).

Files	Patch %	Lines
crates/bitwarden-exporters/src/models.rs	28.57%	10 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #833 +/- ## ======================================= Coverage 59.23% 59.24% ======================================= Files 186 186 Lines 12428 12426 -2 ======================================= Hits 7362 7362 + Misses 5066 5064 -2 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.