Dev

refactor: abstract a common merger to do merge sort. #8668

Job	Run time
changes	23s
linux / build (x86_64, gnu)	9m 41s
linux / build_address_sanitizer (aarch64, gnu)	15m 22s
linux / check	8m 16s
linux / build_other (aarch64, musl)	14m 23s
linux / license	11s
linux / test_unit	15m 4s
linux_hive / build (x86_64, gnu)	14m 20s
linux / test_compat_fuse	0s
linux / test_metactl	0s
linux / test_compat	0s
linux / test_meta-data-compat-openraft-07	0s
linux / test_meta_cluster	0s
linux / test_stateful_sharing	0s
linux / test_stateful_standalone	0s
linux / test_stateless_cluster	0s
linux / test_stateless_standalone	0s
linux / test_ee_standalone	0s
linux / test_stateful_large_data	0s
linux / test_stateful_cluster	0s
linux / sqllogic	0s
linux / sqllogic_ee	0s
linux / test_ee_standalone_background	0s
linux_hive / test_stateful_hive_standalone	1s
ready	4s
	1h 17m 45s

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