[Refactor] Split pipeline fragment reporting from QueryContextManager

[alvin-phoenix-ai]

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 pr needs auto generate documentation
• 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
  • 4.1
  • 4.0
  • 3.5

[CelerData-Reviewer]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Hooray!

Reviewed commit: 31397a3299

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[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 : 50 / 138 (36.23%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	be/src/runtime/pipeline_fragment_reporter.cpp	22	110	20.00%	[41, 46, 47, 48, 50, 51, 52, 55, 56, 57, 58, 59, 62, 63, 64, 65, 67, 68, 70, 71, 72, 73, 74, 75, 77, 78, 79, 82, 83, 84, 87, 88, 89, 90, 91, 93, 120, 125, 126, 128, 130, 131, 134, 135, 136, 137, 140, 141, 142, 143, 145, 147, 149, 150, 151, 152, 153, 154, 156, 157, 158, 161, 162, 163, 166, 168, 169, 171, 175, 176, 178, 179, 181, 182, 184, 185, 187, 188, 189, 190, 194, 195, 196, 197, 198, 199, 201, 202]
🔵	be/src/runtime/exec_env.cpp	1	1	100.00%	[]
🔵	be/src/compute_env/query/connector_scan_mem_share_arbitrator.cpp	11	11	100.00%	[]
🔵	be/src/compute_env/query/global_late_materialization_context.cpp	9	9	100.00%	[]
🔵	be/src/compute_env/query/global_late_materialization_context.h	2	2	100.00%	[]
🔵	be/src/exec/pipeline/query_context.cpp	2	2	100.00%	[]
🔵	be/src/compute_env/query/connector_scan_mem_share_arbitrator.h	3	3	100.00%	[]