#148: Remove --!syntax_v1 directive everywhere

YQLv1 **is** available for all YOJ users (but some need to set the corresponding feature flag in their database).

Author: nvamelichev

repository-ydb-v2/src/main/java/tech/ydb/yoj/repository/ydb/YdbRepositoryTransaction.java

@@ -273,7 +273,7 @@ private TxControl<?> getTxControl() {
     private String getYql(Statement<?, ?> statement) {
         // TODO(nvamelichev): Make the use of syntax_v1 directive configurable in YdbRepository.Settings
         // @see https://github.com/ydb-platform/yoj-project/issues/148
-        return "--!syntax_v1\n" + statement.getQuery(tablespace);
+        return statement.getQuery(tablespace);
     }
 
     private static <PARAMS> Params getSdkParams(Statement<PARAMS, ?> statement, PARAMS params) {

repository-ydb-v2/src/main/java/tech/ydb/yoj/repository/ydb/compatibility/YdbSchemaCompatibilityChecker.java

@@ -109,7 +109,7 @@ public void run() {
         if (!canExecuteMessages.isEmpty()) {
             var ddl = config.useBuilderDDLSyntax
                     ? String.join(",\n", canExecuteMessages)
-                    : "--!syntax_v1\n" + String.join("\n", canExecuteMessages);
+                    : String.join("\n", canExecuteMessages);
 
             BiConsumer<String, String> logConsumer = config.warnOnMinorDifferences ? log::warn : log::info;
             logConsumer.accept("DB schema and code schema have minor differences.\n"
@@ -122,7 +122,7 @@ public void run() {
         if (!shouldExecuteMessages.isEmpty()) {
             var ddl = config.useBuilderDDLSyntax
                     ? String.join(",\n", shouldExecuteMessages)
-                    : "--!syntax_v1\n" + String.join("\n", shouldExecuteMessages);
+                    : String.join("\n", shouldExecuteMessages);
             log.error("DB schema and code schema have major differences.\n"
                             + "You must execute below commands before deploying the code:\n"
                             + "{}",