perf: merge small byte ranges for optimized fetching (#4520) #19019

Job	Run time
Check typos and docs	6s
Check (windows-2022)	6m 31s
Check (ubuntu-20.04)	2m 12s
Check License Header	1m 31s
Build GreptimeDB binary (profile-CI) (ubuntu-20.04)	3m 34s
Build GreptimeDB binaries (ubuntu-20.04)	4m 44s
Clippy	3m 45s
Rustfmt	33s
Toml Check	31s
coverage	16m 29s
Unstable Fuzz Test (unstable_fuzz_create_table_standalone)	6m 23s
Fuzz Test (Distributed, Remote WAL, fuzz_create_table)	10m 21s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_migrate_mito_regions)	10m 52s
Fuzz Test (Distributed, Remote WAL, fuzz_alter_table)	10m 28s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_failover_mito_regions)	11m 51s
Fuzz Test (Distributed, Remote WAL, fuzz_create_database)	10m 14s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_failover_metric_regions)	10m 47s
Fuzz Test (Distributed, Remote WAL, fuzz_create_logical_table)	12m 0s
Fuzz Test (Distributed, Remote WAL, fuzz_alter_logical_table)	10m 42s
Fuzz Test (Distributed, Remote WAL, fuzz_insert)	11m 18s
Fuzz Test (Distributed, Remote WAL, fuzz_insert_logical_table)	10m 17s
Sqlness Test (Basic)	2m 45s
Sqlness Test (Remote WAL)	3m 9s
Fuzz Test (fuzz_create_table)	8m 1s
Fuzz Test (fuzz_alter_table)	7m 23s
Fuzz Test (fuzz_create_database)	8m 50s
Fuzz Test (fuzz_create_logical_table)	7m 12s
Fuzz Test (fuzz_alter_logical_table)	8m 40s
Fuzz Test (fuzz_insert)	9m 11s
Fuzz Test (fuzz_insert_logical_table)	8m 41s
	3h 39m 1s

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