Upgrade Rust to 1.52.0 (#17096)

* Upgrade Rust to 1.52.0
update nightly_version to newly pushed docker image
fix clippy lint errors
1.52 comes with grcov 0.8.0, include this version to script

* upgrade to Rust 1.52.1

* disabling Serum from downstream projects until it is upgraded to Rust 1.52.1

cli/src/checks.rs

@@ -231,18 +231,9 @@ mod tests {
         mocks.insert(RpcRequest::GetBalance, account_balance_response);
         let rpc_client = RpcClient::new_mock_with_mocks("".to_string(), mocks);
 
-        assert_eq!(
-            check_account_for_balance(&rpc_client, &pubkey, 1).unwrap(),
-            true
-        );
-        assert_eq!(
-            check_account_for_balance(&rpc_client, &pubkey, account_balance).unwrap(),
-            true
-        );
-        assert_eq!(
-            check_account_for_balance(&rpc_client, &pubkey, account_balance + 1).unwrap(),
-            false
-        );
+        assert!(check_account_for_balance(&rpc_client, &pubkey, 1).unwrap());
+        assert!(check_account_for_balance(&rpc_client, &pubkey, account_balance).unwrap());
+        assert!(!check_account_for_balance(&rpc_client, &pubkey, account_balance + 1).unwrap());
     }
 
     #[test]

cli/src/lib.rs

@@ -10,7 +10,6 @@ macro_rules! ACCOUNT_STRING {
     };
 }
 
-#[macro_use]
 macro_rules! pubkey {
     ($arg:expr, $help:expr) => {
         $arg.takes_value(true)