[Feature] test code

[zenoyang]

Why I'm doing:

Support segment load for share nothing mode.
Just for share, not ready to review.

What I'm doing:

Fixes #issue

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• Interface/UI changes: syntax, type conversion, expression evaluation, display information
• Parameter changes: default values, similar parameters but with different default values
• Policy changes: use new policy to replace old one, functionality automatically enabled
• Feature removed
• Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• I have added test cases for my bug fix or my new feature
• This pr needs user documentation (for new or modified features or behaviors)
  • I have added documentation for my new feature or new function
• This is a backport pr

Bugfix cherry-pick branch check:

• I have checked the version labels which the pr will be auto-backported to the target branch
  • 3.3
  • 3.2
  • 3.1
  • 3.0
  • 2.5

[github-actions]

[FE Incremental Coverage Report]

❌ fail : 19 / 47 (40.43%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	com/starrocks/task/PushTask.java	0	1	00.00%	[199]
🔵	com/starrocks/load/BrokerFileGroup.java	0	1	00.00%	[225]
🔵	com/starrocks/fs/hdfs/HdfsFsManager.java	0	12	00.00%	[1217, 1218, 1227, 1228, 1229, 1231, 1232, 1233, 1234, 1235, 1239, 1240]
🔵	com/starrocks/load/loadv2/LoadMgr.java	1	6	16.67%	[495, 496, 499, 500, 501]
🔵	com/starrocks/leader/LeaderImpl.java	2	5	40.00%	[591, 592, 607]
🔵	com/starrocks/sql/analyzer/LoadStmtAnalyzer.java	4	8	50.00%	[100, 129, 131, 132]
🔵	com/starrocks/fs/HdfsUtil.java	4	6	66.67%	[78, 79]
🔵	com/starrocks/load/EtlJobType.java	1	1	100.00%	[]
🔵	com/starrocks/load/loadv2/SparkLoadJob.java	1	1	100.00%	[]
🔵	com/starrocks/common/util/BrokerUtil.java	5	5	100.00%	[]
🔵	com/starrocks/metric/TableMetricsEntity.java	1	1	100.00%	[]

[github-actions]

[BE Incremental Coverage Report]

✅ pass : 0 / 0 (0%)