chore: add more content type support for log inserter api #50

Job	Run time
Build GreptimeDB binary (profile-CI) (ubuntu-20.04)	3m 19s
Check (windows-2022)	6m 50s
Check typos and docs	5s
Check (ubuntu-20.04)	1m 56s
Clippy	3m 9s
Build GreptimeDB binaries (ubuntu-20.04)	4m 23s
Rustfmt	33s
Check License Header	1m 22s
Toml Check	19s
coverage	1s
Fuzz Test (Distributed, Disk) (fuzz_create_table)	7m 8s
Fuzz Test (Distributed, Disk) (fuzz_alter_table)	6m 44s
Fuzz Test (Distributed, Disk) (fuzz_create_database)	6m 47s
Fuzz Test (Distributed, Disk) (fuzz_create_logical_table)	7m 17s
Fuzz Test (Distributed, Disk) (fuzz_alter_logical_table)	6m 44s
Fuzz Test (Distributed, Disk) (fuzz_insert)	7m 10s
Fuzz Test (Distributed, Disk) (fuzz_insert_logical_table)	8m 24s
Sqlness Test (ubuntu-20.04)	2m 39s
Unstable Fuzz Test (unstable_fuzz_create_table_standalone)	11m 46s
Sqlness Test with Kafka Wal (ubuntu-20.04)	3m 10s
Fuzz Test (fuzz_create_table)	5m 6s
Fuzz Test (fuzz_alter_table)	4m 51s
Fuzz Test (fuzz_create_database)	5m 1s
Fuzz Test (fuzz_create_logical_table)	4m 56s
Fuzz Test (fuzz_alter_logical_table)	5m 13s
Fuzz Test (fuzz_insert)	4m 37s
Fuzz Test (fuzz_insert_logical_table)	4m 50s
	2h 4m 20s

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