[FEATURE] - The servicecomb-client supports configurable connectTimeout , connectRequestTimeout, socketTimeout.

[chengyouling]

Problem this feature would solve

When the network is delayed or the server is under heavy pressure, increase the timeout interval to improve the client connection success rate.

Describe the solution

Service-center , config-center separately provide configurable timeout interval.

For example:
service-center provider three configuration：
servicecomb.serviceCenter.connectTimeout、servicecomb.serviceCenter.connectRequestTimeout、servicecomb.serviceCenter.socketTimeout

config-center provider three configuration：
servicecomb.configCenter.connectTimeout、servicecomb.configCenter.connectRequestTimeout、servicecomb.configCenter.socketTimeout

Alternatives considered

No response

Additional Context

No response

[liubao68]

Sounds good to me. The key should follow conventions and refer to some exsiting keys.