readyset-psql: Fix citext tests

Adds calls to `eventually!` in the two citext tests to ensure that the
prior `CREATE TABLE` statement is replicated before we attempt to
prepare a statement or perform a migration.

Fixes: REA-3062
Change-Id: Ib3363bab6a5fa664ac264455d120d8c7c912d777
Reviewed-on: https://gerrit.readyset.name/c/readyset/+/6223
Tested-by: Buildkite CI
Reviewed-by: Luke Osborne <luke@readyset.io>
Reviewed-by: Aspen Smith <aspen@readyset.io>

readyset-psql/tests/types.rs

@@ -893,6 +893,16 @@ mod types {
             .await
             .unwrap();
 
+        // Wait until the `CREATE TABLE` has been replicated
+        eventually!(run_test: {
+            let result = client
+                .simple_query("CREATE CACHE FROM SELECT * FROM t WHERE x = $1")
+                .await;
+            AssertUnwindSafe(move || result)
+        }, then_assert: |result| {
+            result().unwrap()
+        });
+
         let stmt = client
             .prepare("SELECT * FROM t WHERE x = $1")
             .await
@@ -933,6 +943,16 @@ mod types {
             .await
             .unwrap();
 
+        // Wait until the `CREATE TABLE` has been replicated
+        eventually!(run_test: {
+            let result = client
+                .simple_query("CREATE CACHE FROM SELECT * FROM t WHERE x = $1")
+                .await;
+            AssertUnwindSafe(move || result)
+        }, then_assert: |result| {
+            result().unwrap()
+        });
+
         let stmt = client
             .prepare("SELECT * FROM t WHERE x = $1")
             .await