[Enhancement] Add storage-related profiles for load

[banmoy]

Why I'm doing:

Need storage metrics in the load profile to know why the load is slow if the bottleneck is at the storage

What I'm doing:

• For primary/peer tablets, there are following metrics
  • the number/cost of methods for DeltaWriter write/close/commit
  • the statistics about memtable including the number/cost of sort, agg, flush
  • for primary tablets, also includes the time to sync segments to secondary replica
  • the pending time of tasks in the queue such as async delta writer task, flush task, segment replica task
• For secondary tablets, there are following metrics
  • the number/cost of methods for DeltaWriter add_segment/commit
  • the statistics about segment flush

Fix #46373

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

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[BE Incremental Coverage Report]

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file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	be/src/storage/memtable_flush_executor.cpp	7	9	77.78%	[94, 95]
🔵	be/src/storage/delta_writer.cpp	21	25	84.00%	[640, 641, 642, 643]
🔵	be/src/storage/memtable.cpp	16	18	88.89%	[356, 357]
🔵	be/src/runtime/local_tablets_channel.cpp	124	125	99.20%	[1010]
🔵	be/src/runtime/lake_tablets_channel.cpp	4	4	100.00%	[]
🔵	be/src/storage/delta_writer.h	5	5	100.00%	[]
🔵	be/src/storage/segment_flush_executor.cpp	14	14	100.00%	[]
🔵	be/src/storage/segment_replicate_executor.cpp	22	22	100.00%	[]
🔵	be/src/storage/segment_replicate_executor.h	2	2	100.00%	[]
🔵	be/src/storage/memtable.h	15	15	100.00%	[]
🔵	be/src/exec/tablet_sink.cpp	1	1	100.00%	[]
🔵	be/src/exec/tablet_sink_index_channel.cpp	1	1	100.00%	[]
🔵	be/src/storage/async_delta_writer.cpp	1	1	100.00%	[]
🔵	be/src/runtime/load_channel.cpp	37	37	100.00%	[]
🔵	be/src/storage/segment_flush_executor.h	2	2	100.00%	[]