chore: rename CUBESTORE_AWS_ROLE to CUBESTORE_AWS_IAM_ROLE

Author: haipham23

rust/cubestore/cubestore/src/remotefs/s3.rs

@@ -59,7 +59,7 @@ impl S3RemoteFs {
             ))
         })?;
 
-        let role_name = env::var("CUBESTORE_AWS_ROLE").ok();
+        let role_name = env::var("CUBESTORE_AWS_IAM_ROLE").ok();
         let (access_key, secret_key) = match role_name {
             Some(role_name) => {
                 assume_role(&role_name, &region.to_string()).await