[SPARK-13010][ML][SPARKR] Implement a simple wrapper of AFTSurvivalRegression in SparkR

## What changes were proposed in this pull request?
This PR continues the work in #11447, we implemented the wrapper of ```AFTSurvivalRegression``` named ```survreg``` in SparkR.

## How was this patch tested?
Test against output from R package survival's survreg.

cc mengxr felixcheung

Close #11447

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #11932 from yanboliang/spark-13010-new.