[SPARK-12885] [MINOR] Rename 3 fields in ShuffleWriteMetrics

[andrewor14]

This is a small step in implementing SPARK-10620, which migrates TaskMetrics to accumulators. This patch is strictly a cleanup patch and introduces no change in functionality. It literally just renames 3 fields for consistency. Today we have:

inputMetrics.recordsRead
outputMetrics.bytesWritten
shuffleReadMetrics.localBlocksFetched
...
shuffleWriteMetrics.shuffleRecordsWritten
shuffleWriteMetrics.shuffleBytesWritten
shuffleWriteMetrics.shuffleWriteTime

The shuffle write ones are kind of redundant. We can drop the shuffle part in the method names. I added backward compatible (but deprecated) methods with the old names.

Parent PR: #10717

[SparkQA]

Test build #49608 has finished for PR 10811 at commit 0a2d9a1.

• This patch fails PySpark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[andrewor14]

retest this please

[andrewor14]

retest this please

[SparkQA]

Test build #49616 has finished for PR 10811 at commit 0a2d9a1.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #49628 has finished for PR 10811 at commit 823156b.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[JoshRosen]

LGTM, so I'm going to merge this now. Thanks!