Assert error message and drop invalid chars due to randomisation issue

Author: pawankartik-elastic

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/parser/StatementParserTests.java

@@ -3283,9 +3283,10 @@ public void testInvalidPatternsWithIntermittentQuotes() {
             var randomInvalidChar = randomFrom(invalidChars);
 
             // Construct the new invalid index pattern.
-            var remoteIndexWithInvalidChar = quote(randomIdentifier() + ":" + "foo" + randomInvalidChar + "bar");
+            var invalidIndexName = "foo" + randomInvalidChar + "bar";
+            var remoteIndexWithInvalidChar = quote(randomIdentifier() + ":" + invalidIndexName);
             var query = "FROM " + randomIndex + "," + remoteIndexWithInvalidChar;
-            expectError(query, "must not contain the following characters ['\"',' ','\\','/',',','|','>','?','<']");
+            expectError(query, "Invalid index name [" + invalidIndexName + "], must not contain the following characters");
         }
 
         // Colon outside a quoted string should result in an ANTLR error: a comma is expected.