feat(organizations): remove hardcoded team label env var TASK-1083 (#5232)

### 📣 Summary
Use the backend env response to set `use_team_label` in the `envStore`.

Author: jamesrkiger

jsapp/js/envStore.ts

@@ -22,8 +22,7 @@ export interface EnvironmentResponse {
   transcription_languages: TransxLanguages;
   translation_languages: TransxLanguages;
   submission_placeholder: string;
-  // TODO: Remove optional marker when PR#5182 is merged
-  use_team_label?: boolean;
+  use_team_label: boolean;
   frontend_min_retry_time: number;
   frontend_max_retry_time: number;
   asr_mt_features_enabled: boolean;
@@ -215,8 +214,7 @@ class EnvStore {
     this.data.project_metadata_fields = response.project_metadata_fields;
     this.data.user_metadata_fields = response.user_metadata_fields;
     this.data.submission_placeholder = response.submission_placeholder;
-    // TODO: Assign response value when PR#5182 is merged
-    this.data.use_team_label = true;
+    this.data.use_team_label = response.use_team_label;
     this.data.mfa_localized_help_text = response.mfa_localized_help_text;
     this.data.mfa_enabled = response.mfa_enabled;
     this.data.mfa_per_user_availability = response.mfa_per_user_availability;