revert changes in test

Author: AMashenkov

modules/sql-engine/src/test/java/org/apache/ignite/internal/sql/engine/planner/IndexSearchBoundsPlannerTest.java

@@ -339,18 +339,10 @@ public void testBoundsTypeConversion() throws Exception {
         );
 
         // Implicit cast of 2 to VARCHAR.
-        // TODO https://issues.apache.org/jira/browse/IGNITE-27391
-        assertPlan("SELECT * FROM TEST WHERE C1 = 1 AND C2 IN (2::VARCHAR, '3')", 
-                List.of(publicSchema), nodeOrAnyChild(isInstanceOf(IgniteIndexScan.class)
-                        .and(scan -> {
-                            boolean boundsMatch = matchBounds(scan.searchBounds(), exact(1));
-                            String condition = scan.condition() != null ? scan.condition().toString() : null;
-                            String expected = 
-                                    "AND(=($t0, 1), OR(=(CAST($t1):VARCHAR CHARACTER SET \"UTF-8\", _UTF-8'2'), =($t1, _UTF-8'3')))";
-                            boolean conditionMatch = Objects.equals(condition, expected);
-                            return boundsMatch && conditionMatch;
-                        })), List.of(),
-                "LogicalTableScanConverterRule", "UnionConverterRule");
+        assertBounds("SELECT * FROM TEST WHERE C1 = 1 AND C2 IN (2::VARCHAR, '3')",
+                exact(1),
+                multi(exact("2"), exact("3"))
+        );
     }
 
     /** Tests bounds with dynamic parameters. */