test: bring back old pyth tests (wip)

Author: Riateche

runtime/src/bank.rs

@@ -200,6 +200,9 @@ mod transaction_account_state_info;
 
 pub mod pyth_accumulator;
 
+#[cfg(test)]
+mod pyth_accumulator_tests;
+
 pub const SECONDS_PER_YEAR: f64 = 365.25 * 24.0 * 60.0 * 60.0;
 
 pub const MAX_LEADER_SCHEDULE_STAKES: Epoch = 5;