fix: disable field pruning in last non null mode #19910

Job	Run time
Check (windows-2022)	8m 40s
Build GreptimeDB binaries (ubuntu-20.04)	3m 18s
Build GreptimeDB binary (profile-CI) (ubuntu-20.04)	3m 48s
Check (ubuntu-20.04)	2m 6s
Check typos and docs	6s
Clippy	3m 16s
coverage	14m 29s
Rustfmt	46s
Check License Header	2m 14s
Toml Check	2m 13s
Sqlness Test (Basic)	2m 34s
Fuzz Test (fuzz_create_table)	4m 54s
Sqlness Test (Remote WAL)	3m 11s
Fuzz Test (fuzz_alter_table)	5m 5s
Fuzz Test (fuzz_create_database)	5m 15s
Fuzz Test (fuzz_create_logical_table)	5m 40s
Fuzz Test (fuzz_alter_logical_table)	4m 31s
Fuzz Test (fuzz_insert)	4m 41s
Fuzz Test (fuzz_insert_logical_table)	5m 21s
Unstable Fuzz Test (unstable_fuzz_create_table_standalone)	7m 48s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_migrate_mito_regions)	7m 7s
Fuzz Test (Distributed, Remote WAL, fuzz_create_table)	7m 27s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_failover_mito_regions)	8m 16s
Fuzz Test (Distributed, Remote WAL, fuzz_alter_table)	8m 2s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_failover_metric_regions)	9m 26s
Fuzz Test (Distributed, Remote WAL, fuzz_create_database)	7m 28s
Fuzz Test (Distributed, Remote WAL, fuzz_create_logical_table)	7m 48s
Fuzz Test (Distributed, Remote WAL, fuzz_alter_logical_table)	7m 22s
Fuzz Test (Distributed, Remote WAL, fuzz_insert)	6m 50s
Fuzz Test (Distributed, Remote WAL, fuzz_insert_logical_table)	8m 32s
	2h 48m 14s

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