Use -strict argument for Thrift code generation to prevent compatibility issues

When generating code, the Thrift compiler has a "-strict" option that errors out for certain warnings. Specifically, it errors out when there are implicit field keys:

        pwarning(1, "No field key specified for %s, resulting protocol may have conflicts or not be backwards compatible!\n", $6);
        if (g_strict >= 192) {
          yyerror("Implicit field keys are deprecated and not allowed with -strict");
          exit(1);
        }

https://github.com/apache/thrift/blob/master/compiler/cpp/src/thrift/thrifty.yy#L824-L828

This is a warning that has been introduced in the past (see HIVE-27103 and HIVE-20365)

I think that it would be useful to add "-strict" to the arguments for Thrift code generation. It would prevent the introduction of new compatibility issues, because the command would fail rather than generating a warning that is easy to miss.

The current Thrift files already work with -strict, so this should be a painless thing.