Update the dynamic flags

[wenhaocs]

Here are the configs used by customer. Please check which can be dynamic:

Graphd:
accept_partial_success: "true"
ca_client_path: /credentials/root_cert.pem
ca_path: /credentials/root_cert.pem
cert_path: /credentials/current/certs.pem
enable_http2_routing: "true"
enable_meta_ssl: "false"
enable_record_slow_query: "false"
enable_storage_ssl: "false"
key_path: /credentials/current/key.pem
max_job_size: "40"
max_sessions_per_ip_per_user: "0"
meta_client_retry_interval_secs: "3"
port: "8080"
prioritize_intra_zone_reading: "false"
redirect_stdout: "false"
session_idle_timeout_secs: "86400"
session_reclaim_interval_secs: "28800"
ssl_server_SAN: managed-graph-http2.prod.snap
ssl_watch_path: /credentials
stderrthreshold: "0"
stream_timeout_ms: "120000"
sync_meta_when_use_space: "true"

Metad:
ca_client_path: /credentials/root_cert.pem
ca_path: /credentials/root_cert.pem
cert_path: /credentials/current/certs.pem
enable_meta_ssl: "false"
enable_storage_ssl: "false"
key_path: /credentials/current/key.pem
redirect_stdout: "false"
ssl_server_SAN: managed-graph-http2.prod.snap
ssl_watch_path: /credentials
stderrthreshold: "0"
validate_session_timestamp: "true"
zone_list: us-east-1a,us-east-1b,us-east-1d

Storaged:
apply_global_limit_to_sample: "false"
apply_limit_on_aggregated_edges: "true"
ca_client_path: /credentials/root_cert.pem
ca_path: /credentials/root_cert.pem
cert_path: /credentials/current/certs.pem
enable_meta_ssl: "false"
enable_storage_ssl: "false"
key_path: /credentials/current/key.pem
max_edge_returned_per_vertex: "2147483647"
meta_client_retry_interval_secs: "3"
num_worker_threads: "120"
reader_handlers: "120"
redirect_stdout: "false"
rocksdb_block_cache: "81920"
rocksdb_db_options: '{"max_subcompactions":"42","max_background_jobs":"42"}'
rocksdb_rate_limit: "480"
ssl_server_SAN: managed-graph-http2.prod.snap
ssl_watch_path: /credentials
stderrthreshold: "0"