[SPARK-14357][CORE] Properly handle the root cause being a commit denied exception

## What changes were proposed in this pull request?

When deciding whether a CommitDeniedException caused a task to fail, consider the root cause of the Exception.

## How was this patch tested?

Added a test suite for the component that extracts the root cause of the error.
Made a distribution after cherry-picking this commit to branch-1.6 and used to run our Spark application that would quite often fail due to the CommitDeniedException.

Author: Jason Moore <jasonmoore2k@outlook.com>

Closes #12228 from jasonmoore2k/SPARK-14357.