feat: move proxy settings page to deployment options (#8246)

* feat: Move workspace proxy page to deployment options

Workspace proxy settings page is now an admin feature

* WorkspaceProxy response extends region

enterprise/coderd/proxyhealth/proxyhealth.go

@@ -171,6 +171,11 @@ func (p *ProxyHealth) ForceUpdate(ctx context.Context) error {
 // HealthStatus returns the current health status of all proxies stored in the
 // cache.
 func (p *ProxyHealth) HealthStatus() map[uuid.UUID]ProxyStatus {
+	if p == nil {
+		// This can happen because workspace proxies are still an experiment.
+		// For the /regions endpoint, this will be nil in those cases.
+		return map[uuid.UUID]ProxyStatus{}
+	}
 	ptr := p.cache.Load()
 	if ptr == nil {
 		return map[uuid.UUID]ProxyStatus{}

enterprise/coderd/proxyhealth/proxyhealth_test.go

@@ -36,6 +36,14 @@ func insertProxy(t *testing.T, db database.Store, url string) database.Workspace
 	return proxy
 }
 
+// Test the nil guard for experiment off cases.
+func TestProxyHealth_Nil(t *testing.T) {
+	t.Parallel()
+	var ph *proxyhealth.ProxyHealth
+
+	require.NotNil(t, ph.HealthStatus())
+}
+
 func TestProxyHealth_Unregistered(t *testing.T) {
 	t.Parallel()
 	db := dbfake.New()