Make io compression zstd level configurable

[turboFei]

Which issue does this PR close?

Closes #.

Rationale for this change

Make zstd level configurable.
https://github.com/apache/spark/blob/bca5f3a0f09e9020f4bda9b07ce70d7c685f9549/core/src/main/scala/org/apache/spark/internal/config/package.scala#L2130-L2136

  private[spark] val IO_COMPRESSION_ZSTD_LEVEL =
    ConfigBuilder("spark.io.compression.zstd.level")
      .doc("Compression level for Zstd compression codec. Increasing the compression " +
        "level will result in better compression at the expense of more CPU and memory")
      .version("2.3.0")
      .intConf
      .createWithDefault(1)

What changes are included in this PR?

Are there any user-facing changes?

[merrily01]

LGTM