fix: sealevel unit tests flake (#4655)

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### Drive-by changes

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### Related issues

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- Fixes #[issue number here]
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### Backward compatibility

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rust/sealevel/programs/validator-announce/tests/functional.rs

@@ -1,6 +1,6 @@
 use hyperlane_core::{Announcement, H160};
 
-use std::str::FromStr;
+use std::{str::FromStr, thread::sleep};
 
 use account_utils::SizedData;
 use borsh::BorshSerialize;
@@ -300,12 +300,7 @@ async fn test_announce() {
         storage_location: announcement.storage_location,
         signature,
     };
-    let (
-        validator_storage_locations_key,
-        validator_storage_locations_bump_seed,
-        replay_protection_key,
-        _replay_protection_bump_seed,
-    ) = announce(
+    let announcement_res = announce(
         &mut banks_client,
         &payer,
         program_id,
@@ -315,6 +310,17 @@ async fn test_announce() {
     .await
     .unwrap();
 
+    // there's a race condition that isn't fixed by setting `CommitmentLevel::Confirmed`
+    // just wait a bit to ensure the account is created
+    sleep(std::time::Duration::from_secs(1));
+
+    let (
+        validator_storage_locations_key,
+        validator_storage_locations_bump_seed,
+        replay_protection_key,
+        _replay_protection_bump_seed,
+    ) = announcement_res;
+
     assert_successful_announcement(
         &mut banks_client,
         program_id,