fix: show_index command output had incorrect order of column names

[linliu-code]

Describe the issue this Pull Request addresses

Before the fix:

scala> spark.sql(s"SHOW INDEXES FROM hudi_indexed_table").show(false);

index_name	col_name	index_type
column_stats	column_stats
partition_stats	partition_stats
expr_index_idx_bloom_driver	bloom_filters	driver

Summary and Changelog

After fix:

scala> spark.sql(s"SHOW INDEXES FROM hudi_indexed_table").show(false);

index_name	index_type	col_name
column_stats	column_stats
partition_stats	partition_stats
expr_index_idx_bloom_driver	bloom_filters	driver

Impact

Fix a minor bug.

Risk Level

None.

Documentation Update

Contributor's checklist

• Read through contributor's guide
• Enough context is provided in the sections above
• Adequate tests were added if applicable

[linliu-code]

Will fix the CI, or fix order of the header instead.

[hudi-bot]

CI report:

• 981f37a Azure: SUCCESS

Bot commands

@hudi-bot supports the following commands:

• @hudi-bot run azure re-run the last Azure build

[nsivabalan]

github actions failed due to related failure.