[Refactor] Modify Coordinator throws Exception to explicit exception type

[HangyuanLiu]

Why I'm doing:

Exception should not be used as a function's throw exception declaration. This is a wrong coding style because the caller cannot handle explicit exceptions correctly.

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
  • 3.4
  • 3.3
  • 3.2
  • 3.1
  • 3.0

[sonarcloud]

Quality Gate failed

Failed conditions
C Reliability Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

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[github-actions]

[Java-Extensions Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

[FE Incremental Coverage Report]

❌ fail : 6 / 8 (75.00%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	com/starrocks/qe/scheduler/FeExecuteCoordinator.java	0	1	00.00%	[136]
🔵	com/starrocks/load/loadv2/LoadMgr.java	0	1	00.00%	[416]
🔵	com/starrocks/qe/StmtExecutor.java	3	3	100.00%	[]
🔵	com/starrocks/qe/scheduler/dag/JobSpec.java	1	1	100.00%	[]
🔵	com/starrocks/qe/DefaultCoordinator.java	1	1	100.00%	[]
🔵	com/starrocks/load/loadv2/InsertLoadJob.java	1	1	100.00%	[]

[github-actions]

[BE Incremental Coverage Report]

✅ pass : 0 / 0 (0%)