feat: use ClientOptions gaxServerStreamingRetries value

[leahecole]

Instead of setting gaxServerStreamingRetries to false, set it to the value in ClientOptions or default to false if not set

Tests in the gax-nodejs test-application should be passing in googleapis/gax-nodejs#1583

[leahecole]

Ooo, there are clearly some other things I need to update - I have to run to a meeting but I will read the error logs to see what needs to be changed. If it's not obvious though, any hints of what I need to fix would be appreciated!

[alexander-fenster]

When you update templates, you also need to update baselines; npm run baseline will do the trick! (takes a few minutes, give it some time)