Use custom uhd auth header for jwt

Use `X-UHD-AUTH` header for the JWT instead of `Authorization` header
- The Authorzation header is already being used for the API key which is
  checked by the AWS load balancer, so commands with just the JWT are
  rejected.
- Sending both headers means the ALB can verify the API key and send the
  request on to Django which can then verify the JWT

Author: mattjreynolds

src/api/utils/api.utils.ts

@@ -100,7 +100,7 @@ export async function client<T>(
       ...customConfig.headers,
       //passing authorization header only if access token is available, to avoid sending
       // "Authorization: Bearer undefined" in the headers which might cause issues with some APIs
-      ...(accessToken ? { Authorization: `Bearer ${accessToken}` } : {}),
+      ...(accessToken ? { 'X-UHD-AUTH': `Bearer ${accessToken}` } : {}),
     },
   }