[Enhancement] enable event scheduler by default

[stdpain]

Why I'm doing:

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

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

[Java-Extensions Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

[FE Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

[BE Incremental Coverage Report]

❌ fail : 46 / 69 (66.67%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	be/src/exec/pipeline/fragment_context.h	0	5	00.00%	[279, 280, 281, 282, 284]
🔵	be/src/exec/pipeline/query_context.cpp	0	10	00.00%	[690, 691, 692, 693, 694, 695, 696, 697, 699, 700]
🔵	be/src/exec/pipeline/pipeline_driver_poller.cpp	0	8	00.00%	[267, 268, 269, 270, 271, 272, 274, 276]
🔵	be/src/exec/pipeline/exchange/exchange_sink_operator.cpp	5	5	100.00%	[]
🔵	be/src/exec/pipeline/fragment_executor.cpp	1	1	100.00%	[]
🔵	be/src/exec/query_cache/multilane_operator.cpp	1	1	100.00%	[]
🔵	be/src/exec/query_cache/conjugate_operator.cpp	2	2	100.00%	[]
🔵	be/src/exec/pipeline/pipeline_driver.h	3	3	100.00%	[]
🔵	be/src/exec/pipeline/fragment_context.cpp	2	2	100.00%	[]
🔵	be/src/exec/pipeline/pipeline_driver.cpp	7	7	100.00%	[]
🔵	be/src/exec/pipeline/nljoin/nljoin_probe_operator.cpp	1	1	100.00%	[]
🔵	be/src/exec/pipeline/schedule/event_scheduler.cpp	1	1	100.00%	[]
🔵	be/src/exec/pipeline/schedule/timeout_tasks.h	2	2	100.00%	[]
🔵	be/src/exec/pipeline/scan/chunk_buffer_limiter.cpp	2	2	100.00%	[]
🔵	be/src/exec/exchange_node.cpp	2	2	100.00%	[]
🔵	be/src/exec/pipeline/scan/chunk_buffer_limiter.h	4	4	100.00%	[]
🔵	be/src/exec/pipeline/wait_operator.cpp	1	1	100.00%	[]
🔵	be/src/exec/pipeline/schedule/observer.cpp	7	7	100.00%	[]
🔵	be/src/exec/pipeline/schedule/timeout_tasks.cpp	3	3	100.00%	[]
🔵	be/src/exec/pipeline/scan/connector_scan_operator.h	1	1	100.00%	[]
🔵	be/src/exec/pipeline/schedule/observer.h	1	1	100.00%	[]