[Enhancement] Simplify code checks using Optional in ClientRequestProcessor#getRouteInfoByTopic method

[mxsm]

Before Creating the Enhancement Request

• I have confirmed that this should be classified as an enhancement rather than a bug/feature.

Summary

Motivation

Simplify code checks using Optional in ClientRequestProcessor#getRouteInfoByTopic method

Describe the Solution You'd Like

Simplify code checks using Optional

Describe Alternatives You've Considered

Simplify the code.

Additional Context

No response

[ChineseTony]

@mxsm hello, I think it's can write to

  boolean standardJsonOnly = Boolean.TRUE.equals(requestHeader.getAcceptStandardJsonOnly());
  if (request.getVersion() >= MQVersion.Version.V4_9_4.ordinal() || standardJsonOnly) {