fix(tmq): fix websocket batchmeta conf error

[zitsen]

When subscribe old version of taosadapter like 3.1.1.35 it will cause tmq_set_conf error -2, which will be reported like:

[0xFFFE] Internal error: `Unknown error 65534`

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 76.90141% with 82 lines in your changes missing coverage. Please review.

Project coverage is 71.39%. Comparing base (a0d1478) to head (f1c9bb7).

Files with missing lines	Patch %	Lines
taos-ws/src/consumer/mod.rs	77.87%	77 Missing :warning:
taos-ws/src/consumer/messages.rs	0.00%	4 Missing :warning:
taos-query/src/lib.rs	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #380 +/- ## ========================================== + Coverage 71.25% 71.39% +0.14% ========================================== Files 97 97 Lines 34322 34652 +330 ========================================== + Hits 24456 24740 +284 - Misses 9866 9912 +46 ```

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[zitsen]

CI CodeCoverage increased：