BRE-292: Sync ephemeral environment with GH workflow

[mimartin12]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/BRE-292

📔 Objective

Adds a job that will run when the ephemeral environment label exists on the pull request. This calls the reusable workflow in the gh-actions repository which will sync the ephemeral environment. This provides a status via the "check" section of the pull request.

An example can be seen here: https://github.com/bitwarden/server/actions/runs/12551766534/job/34996863441

📸 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

[github-actions]

Checkmarx One – Scan Summary & Details – b63d3e65-9ac0-4091-98d7-e9c5e953b683

New Issues

Severity	Issue	Source File / Package	Checkmarx Insight
	CVE-2024-21538	Npm-cross-spawn-7.0.3	Vulnerable Package
	CVE-2024-55565	Npm-nanoid-3.3.7	Vulnerable Package

Fixed Issues

Severity	Issue	Source File / Package
	CSRF	/src/Api/Auth/Controllers/AccountsController.cs: 967
	CSRF	/src/Api/KeyManagement/Controllers/AccountsKeyManagementController.cs: 37
	CSRF	/src/Api/NotificationCenter/Controllers/NotificationsController.cs: 67
	CSRF	/src/Api/NotificationCenter/Controllers/NotificationsController.cs: 61
	Log_Forging	/src/Api/Auth/Controllers/AccountsController.cs: 967
	Unsafe_Use_Of_Target_blank	/src/Core/MailTemplates/Handlebars/OrganizationDomainUnclaimed.html.hbs: 20

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.34%. Comparing base (94761a8) to head (4bd5e18).
Report is 60 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5174      +/-   ##
==========================================
+ Coverage   42.92%   43.34%   +0.42%     
==========================================
  Files        1433     1458      +25     
  Lines       65672    66517     +845     
  Branches     6022     6081      +59     
==========================================
+ Hits        28191    28835     +644     
- Misses      36215    36390     +175     
- Partials     1266     1292      +26     

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