chore: refactor end-to-end tests for emergency server and feature toggles

- Implemented tests for the emergency server (Tier 2) to validate health checks, security reset functionality, and independent access.
- Created a comprehensive suite for system settings feature toggles, ensuring proper state management and API call metrics reporting.
- Removed redundant feature toggle tests from the system settings spec to maintain clarity and focus.
- Enhanced test isolation by restoring default feature flag states after each test.

.github/workflows/e2e-tests-split.yml

@@ -871,7 +871,6 @@ jobs:
             tests/core \
             tests/dns-provider-crud.spec.ts \
             tests/dns-provider-types.spec.ts \
-            tests/emergency-server \
             tests/integration \
             tests/manual-dns-provider.spec.ts \
             tests/monitoring \
@@ -1052,7 +1051,6 @@ jobs:
             tests/core \
             tests/dns-provider-crud.spec.ts \
             tests/dns-provider-types.spec.ts \
-            tests/emergency-server \
             tests/integration \
             tests/manual-dns-provider.spec.ts \
             tests/monitoring \
@@ -1233,7 +1231,6 @@ jobs:
             tests/core \
             tests/dns-provider-crud.spec.ts \
             tests/dns-provider-types.spec.ts \
-            tests/emergency-server \
             tests/integration \
             tests/manual-dns-provider.spec.ts \
             tests/monitoring \