fix buffer size for updateable program buffer rent exempt fee calculation (#34781)

fix buffer size for updateable program buffer rent exempt fee
calculation

Co-authored-by: HaoranYi <haoran.yi@solana.com>

Author: HaoranYi

runtime/src/loader_utils.rs

@@ -116,7 +116,7 @@ pub fn load_upgradeable_buffer<T: Client>(
     let program = load_program_from_file(name);
     let buffer_pubkey = buffer_keypair.pubkey();
     let buffer_authority_pubkey = buffer_authority_keypair.pubkey();
-    let program_buffer_bytes = UpgradeableLoaderState::size_of_programdata(program.len());
+    let program_buffer_bytes = UpgradeableLoaderState::size_of_buffer(program.len());
 
     bank_client
         .send_and_confirm_message(