BRE-292: Add workflow for ephemeral environment management

[mimartin12]

🎟️ Tracking

📔 Objective

This intends to take the existing workflow here https://github.com/bitwarden/devops/blob/main/.github/workflows/_ephemeral_environment_pr_manager.yml and bring it into a public repository. So that we can leverage it in CI workflows directly. Instead of calling await github.rest.actions.createWorkflowDispatch. This allows the status of the called workflow to be present directly in the user's CI status.

This also adds additional sync_environment feature that were in the PR here. https://github.com/bitwarden/devops/pull/2957. This adds an input that, when called, syncs the environment based on the pull request.

📸 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 – 547ea014-2058-41e3-8218-f38edb42ed22

New Issues

Severity	Issue	Source File / Package	Checkmarx Insight
	CVE-2024-21538	Npm-cross-spawn-7.0.3	Vulnerable Package
	CVE-2024-45296	Npm-path-to-regexp-6.2.1	Vulnerable Package
	Cx687dda59-2e3a	Npm-unzip-stream-0.3.1	Vulnerable Package
	Cxdca8e59f-8bfe	Npm-inflight-1.0.6	Vulnerable Package
	CVE-2021-34532	Nuget-Microsoft.AspNetCore.Authentication.JwtBearer-3.0.0	Vulnerable Package
	CVE-2024-24758	Npm-undici-5.28.2	Vulnerable Package
	CVE-2024-30260	Npm-undici-5.28.2	Vulnerable Package
	CVE-2024-4067	Npm-micromatch-4.0.5	Vulnerable Package
	CVE-2024-30261	Npm-undici-5.28.2	Vulnerable Package
	Cx8bc4df28-fcf5	Npm-debug-4.3.4	Vulnerable Package