[PM-17948] Migrate export from generator legacy to generator core

[djsmith85]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-17948

📔 Objective

Migrate the usage of @bitwarden/generator-legacy to @bitwarden/generator-core

Functionality of generating a password for a password protected export stays the same, but uses the new credential-generator services instead.

Relates to #13208

⏰ 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 – a0939e25-671d-4d5d-bdc8-980cd618409f

Great job, no security vulnerabilities found in this Pull Request

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 35.18%. Comparing base (d7baa60) to head (a003aeb).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13238      +/-   ##
==========================================
- Coverage   35.19%   35.18%   -0.01%     
==========================================
  Files        3128     3128              
  Lines       92667    92667              
  Branches    16854    16854              
==========================================
- Hits        32610    32603       -7     
- Misses      57599    57606       +7     
  Partials     2458     2458              

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[audreyality]

This code is good enough, but it could be improved.