[PM-13829] Allow deletion for items with no collectionId(s)

[BTreston]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-13829

📔 Objective

This PR fixes an issue where owners cannot delete unassigned items from the item modal. This change brings the logic in line with the vault component, where the item can be deleted when it is unassigned (i.e the inline delete button on the item).

📸 Screenshots

⏰ 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 1 line in your changes missing coverage. Please review.

Project coverage is 33.53%. Comparing base (a049b55) to head (379018e).
Report is 57 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...angular/src/vault/components/add-edit.component.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #11825   +/-   ##
=======================================
  Coverage   33.53%   33.53%           
=======================================
  Files        2814     2814           
  Lines       87465    87470    +5     
  Branches    16676    16678    +2     
=======================================
+ Hits        29330    29333    +3     
- Misses      55830    55831    +1     
- Partials     2305     2306    +1     

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