box up some accounts in Optional test (#2344)

tests/optional/programs/optional/src/context.rs

@@ -6,7 +6,7 @@ pub struct Initialize<'info> {
     #[account(mut)]
     pub payer: Option<Signer<'info>>,
     #[account(init, payer = payer, space = DataAccount::LEN, constraint = payer.is_some())]
-    pub optional_account: Option<Account<'info, DataAccount>>,
+    pub optional_account: Option<Box<Account<'info, DataAccount>>>,
     pub system_program: Option<Program<'info, System>>,
     #[account(zero)]
     pub required: Account<'info, DataAccount>,
@@ -22,7 +22,7 @@ pub struct Update<'info> {
     #[account(mut, seeds=[DataPda::PREFIX.as_ref(), optional_account.as_ref().unwrap().key().as_ref()], bump = pda_bump)]
     pub optional_pda: Option<Account<'info, DataPda>>,
     #[account(mut, signer, constraint = payer.is_some())]
-    pub optional_account: Option<Account<'info, DataAccount>>,
+    pub optional_account: Option<Box<Account<'info, DataAccount>>>,
 }
 
 #[derive(Accounts)]
@@ -43,7 +43,7 @@ pub struct Close<'info> {
     #[account(mut)]
     pub payer: Option<Signer<'info>>,
     #[account(mut, close = payer, has_one = data_account)]
-    pub optional_pda: Option<Account<'info, DataPda>>,
+    pub optional_pda: Option<Box<Account<'info, DataPda>>>,
     #[account(mut, signer, close = payer)]
     pub data_account: Option<Account<'info, DataAccount>>,
     pub system_program: Option<Program<'info, System>>,