General improvements to Humanitec integration

backend/src/lib/api-docs/constants.ts

@@ -1775,7 +1775,8 @@ export const SecretSyncs = {
     HUMANITEC: {
       app: "The ID of the Humanitec app to sync secrets to.",
       org: "The ID of the Humanitec org to sync secrets to.",
-      env: "The ID of the Humanitec environment to sync secrets to."
+      env: "The ID of the Humanitec environment to sync secrets to.",
+      scope: "The Humanitec scope that secrets should be synced to."
     }
   }
 };

backend/src/lib/config/env.ts

@@ -224,9 +224,6 @@ const envSchema = z
     DATADOG_SERVICE: zpStr(z.string().optional().default("infisical-core")),
     DATADOG_HOSTNAME: zpStr(z.string().optional()),
 
-    // humanitec
-    INF_APP_CONNECTION_HUMANITEC_ACCESS_KEY: zpStr(z.string().optional()),
-
     /* CORS ----------------------------------------------------------------------------- */
 
     CORS_ALLOWED_ORIGINS: zpStr(