refactor: introduce `AppBuilder` trait #16219

Job	Run time
Check typos and docs	5s
Toml Check	38s
Check (windows-2022)	5m 49s
Check License Header	1m 22s
Check (ubuntu-20.04)	1m 45s
Build GreptimeDB binaries (ubuntu-20.04)	4m 6s
Clippy	3m 7s
coverage	0s
Rustfmt	27s
Unstable Fuzz Test (unstable_fuzz_create_table_standalone)	13m 41s
Sqlness Test with Kafka Wal (ubuntu-20.04)	3m 8s
Sqlness Test (ubuntu-20.04)	2m 19s
Fuzz Test (fuzz_create_table)	5m 0s
Fuzz Test (fuzz_alter_table)	5m 24s
Fuzz Test (fuzz_create_database)	5m 5s
Fuzz Test (fuzz_create_logical_table)	4m 58s
Fuzz Test (fuzz_alter_logical_table)	4m 53s
Fuzz Test (fuzz_insert)	4m 42s
Fuzz Test (fuzz_insert_logical_table)	5m 14s
	1h 11m 43s

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