Drain the entire compute budget (bp #12478) (#12492)

* Drain the entire compute budget (#12478)


(cherry picked from commit d00453f747)

* fix conflict

Co-authored-by: Jack May <jack@solana.com>

runtime/src/message_processor.rs

@@ -187,8 +187,9 @@ pub struct ThisComputeMeter {
 }
 impl ComputeMeter for ThisComputeMeter {
     fn consume(&mut self, amount: u64) -> Result<(), InstructionError> {
+        let exceeded = self.remaining < amount;
         self.remaining = self.remaining.saturating_sub(amount);
-        if self.remaining == 0 {
+        if exceeded {
             return Err(InstructionError::ComputationalBudgetExceeded);
         }
         Ok(())